Solve for x
x=700
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980=1.4x+0.4x\times 0\times 4
Combine x and 0.4x to get 1.4x.
980=1.4x+0x\times 4
Multiply 0.4 and 0 to get 0.
980=1.4x+0x
Multiply 0 and 4 to get 0.
980=1.4x+0
Anything times zero gives zero.
980=1.4x
Anything plus zero gives itself.
1.4x=980
Swap sides so that all variable terms are on the left hand side.
x=\frac{980}{1.4}
Divide both sides by 1.4.
x=\frac{9800}{14}
Expand \frac{980}{1.4} by multiplying both numerator and the denominator by 10.
x=700
Divide 9800 by 14 to get 700.
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