Solve for M
M=3.4
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7M=31.8-8
Subtract 8 from both sides.
7M=23.8
Subtract 8 from 31.8 to get 23.8.
M=\frac{23.8}{7}
Divide both sides by 7.
M=\frac{238}{70}
Expand \frac{23.8}{7} by multiplying both numerator and the denominator by 10.
M=\frac{17}{5}
Reduce the fraction \frac{238}{70} to lowest terms by extracting and canceling out 14.
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