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x=-2
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2.56\times 1000000000+x\times 1.28\times 10^{9}+5\times 2.56\times 10^{8}=\frac{2.56\times 10^{9}+x\times 1.28\times 10^{9}}{0.7\times 4}+5\times 2.56\times 10^{8}
Calculate 10 to the power of 9 and get 1000000000.
2560000000+x\times 1.28\times 10^{9}+5\times 2.56\times 10^{8}=\frac{2.56\times 10^{9}+x\times 1.28\times 10^{9}}{0.7\times 4}+5\times 2.56\times 10^{8}
Multiply 2.56 and 1000000000 to get 2560000000.
2560000000+x\times 1.28\times 1000000000+5\times 2.56\times 10^{8}=\frac{2.56\times 10^{9}+x\times 1.28\times 10^{9}}{0.7\times 4}+5\times 2.56\times 10^{8}
Calculate 10 to the power of 9 and get 1000000000.
2560000000+x\times 1280000000+5\times 2.56\times 10^{8}=\frac{2.56\times 10^{9}+x\times 1.28\times 10^{9}}{0.7\times 4}+5\times 2.56\times 10^{8}
Multiply 1.28 and 1000000000 to get 1280000000.
2560000000+x\times 1280000000+12.8\times 10^{8}=\frac{2.56\times 10^{9}+x\times 1.28\times 10^{9}}{0.7\times 4}+5\times 2.56\times 10^{8}
Multiply 5 and 2.56 to get 12.8.
2560000000+x\times 1280000000+12.8\times 100000000=\frac{2.56\times 10^{9}+x\times 1.28\times 10^{9}}{0.7\times 4}+5\times 2.56\times 10^{8}
Calculate 10 to the power of 8 and get 100000000.
2560000000+x\times 1280000000+1280000000=\frac{2.56\times 10^{9}+x\times 1.28\times 10^{9}}{0.7\times 4}+5\times 2.56\times 10^{8}
Multiply 12.8 and 100000000 to get 1280000000.
3840000000+x\times 1280000000=\frac{2.56\times 10^{9}+x\times 1.28\times 10^{9}}{0.7\times 4}+5\times 2.56\times 10^{8}
Add 2560000000 and 1280000000 to get 3840000000.
3840000000+x\times 1280000000=\frac{2.56\times 1000000000+x\times 1.28\times 10^{9}}{0.7\times 4}+5\times 2.56\times 10^{8}
Calculate 10 to the power of 9 and get 1000000000.
3840000000+x\times 1280000000=\frac{2560000000+x\times 1.28\times 10^{9}}{0.7\times 4}+5\times 2.56\times 10^{8}
Multiply 2.56 and 1000000000 to get 2560000000.
3840000000+x\times 1280000000=\frac{2560000000+x\times 1.28\times 1000000000}{0.7\times 4}+5\times 2.56\times 10^{8}
Calculate 10 to the power of 9 and get 1000000000.
3840000000+x\times 1280000000=\frac{2560000000+x\times 1280000000}{0.7\times 4}+5\times 2.56\times 10^{8}
Multiply 1.28 and 1000000000 to get 1280000000.
3840000000+x\times 1280000000=\frac{2560000000+x\times 1280000000}{2.8}+5\times 2.56\times 10^{8}
Multiply 0.7 and 4 to get 2.8.
3840000000+x\times 1280000000=\frac{2560000000+x\times 1280000000}{2.8}+12.8\times 10^{8}
Multiply 5 and 2.56 to get 12.8.
3840000000+x\times 1280000000=\frac{2560000000+x\times 1280000000}{2.8}+12.8\times 100000000
Calculate 10 to the power of 8 and get 100000000.
3840000000+x\times 1280000000=\frac{2560000000+x\times 1280000000}{2.8}+1280000000
Multiply 12.8 and 100000000 to get 1280000000.
3840000000+x\times 1280000000=\frac{2560000000}{2.8}+\frac{x\times 1280000000}{2.8}+1280000000
Divide each term of 2560000000+x\times 1280000000 by 2.8 to get \frac{2560000000}{2.8}+\frac{x\times 1280000000}{2.8}.
3840000000+x\times 1280000000=\frac{25600000000}{28}+\frac{x\times 1280000000}{2.8}+1280000000
Expand \frac{2560000000}{2.8} by multiplying both numerator and the denominator by 10.
3840000000+x\times 1280000000=\frac{6400000000}{7}+\frac{x\times 1280000000}{2.8}+1280000000
Reduce the fraction \frac{25600000000}{28} to lowest terms by extracting and canceling out 4.
3840000000+x\times 1280000000=\frac{6400000000}{7}+x\times \frac{3200000000}{7}+1280000000
Divide x\times 1280000000 by 2.8 to get x\times \frac{3200000000}{7}.
3840000000+x\times 1280000000=\frac{6400000000}{7}+x\times \frac{3200000000}{7}+\frac{8960000000}{7}
Convert 1280000000 to fraction \frac{8960000000}{7}.
3840000000+x\times 1280000000=\frac{6400000000+8960000000}{7}+x\times \frac{3200000000}{7}
Since \frac{6400000000}{7} and \frac{8960000000}{7} have the same denominator, add them by adding their numerators.
3840000000+x\times 1280000000=\frac{15360000000}{7}+x\times \frac{3200000000}{7}
Add 6400000000 and 8960000000 to get 15360000000.
3840000000+x\times 1280000000-x\times \frac{3200000000}{7}=\frac{15360000000}{7}
Subtract x\times \frac{3200000000}{7} from both sides.
3840000000+\frac{5760000000}{7}x=\frac{15360000000}{7}
Combine x\times 1280000000 and -x\times \frac{3200000000}{7} to get \frac{5760000000}{7}x.
\frac{5760000000}{7}x=\frac{15360000000}{7}-3840000000
Subtract 3840000000 from both sides.
\frac{5760000000}{7}x=\frac{15360000000}{7}-\frac{26880000000}{7}
Convert 3840000000 to fraction \frac{26880000000}{7}.
\frac{5760000000}{7}x=\frac{15360000000-26880000000}{7}
Since \frac{15360000000}{7} and \frac{26880000000}{7} have the same denominator, subtract them by subtracting their numerators.
\frac{5760000000}{7}x=-\frac{11520000000}{7}
Subtract 26880000000 from 15360000000 to get -11520000000.
x=\frac{-\frac{11520000000}{7}}{\frac{5760000000}{7}}
Divide both sides by \frac{5760000000}{7}.
x=\frac{-11520000000}{7\times \frac{5760000000}{7}}
Express \frac{-\frac{11520000000}{7}}{\frac{5760000000}{7}} as a single fraction.
x=\frac{-11520000000}{5760000000}
Multiply 7 and \frac{5760000000}{7} to get 5760000000.
x=-2
Divide -11520000000 by 5760000000 to get -2.
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