Solve for x
x=2.6
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2.1+4x=12.5
Multiply 0.7 and 3 to get 2.1.
4x=12.5-2.1
Subtract 2.1 from both sides.
4x=10.4
Subtract 2.1 from 12.5 to get 10.4.
x=\frac{10.4}{4}
Divide both sides by 4.
x=\frac{104}{40}
Expand \frac{10.4}{4} by multiplying both numerator and the denominator by 10.
x=\frac{13}{5}
Reduce the fraction \frac{104}{40} to lowest terms by extracting and canceling out 8.
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