Solve for x
x=19
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3.5x+2.8=3x+12.3
Use the distributive property to multiply 0.7 by 5x+4.
3.5x+2.8-3x=12.3
Subtract 3x from both sides.
0.5x+2.8=12.3
Combine 3.5x and -3x to get 0.5x.
0.5x=12.3-2.8
Subtract 2.8 from both sides.
0.5x=9.5
Subtract 2.8 from 12.3 to get 9.5.
x=\frac{9.5}{0.5}
Divide both sides by 0.5.
x=\frac{95}{5}
Expand \frac{9.5}{0.5} by multiplying both numerator and the denominator by 10.
x=19
Divide 95 by 5 to get 19.
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