How do you solve 1.2m+7.5m+2.1=631.2m+7.5m+2.1=63?

1 Answer
Jun 18, 2015

m=(63-2.1)/(1.2+7.5)=60.9/8.7 = 7m=632.11.2+7.5=60.98.7=7

Explanation:

First subtract 2.12.1 from both sides of the equation to get:

1.2m+7.5m = 63-2.1 = 60.91.2m+7.5m=632.1=60.9

1.2m + 7.5m = (1.2+7.5)m = 8.7m1.2m+7.5m=(1.2+7.5)m=8.7m

So 8.7m = 60.98.7m=60.9

Divide both sides by 8.78.7 to get:

m = 60.9/8.7 = 7m=60.98.7=7