.9(5-2r)+.6(2.5r-4)=7.2

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Solution for .9(5-2r)+.6(2.5r-4)=7.2 equation: 



.9(5-2r)+.6(2.5r-4)=7.2

We move all terms to the left:

.9(5-2r)+.6(2.5r-4)-(7.2)=0

We add all the numbers together, and all the variables

.9(-2r+5)+.6(2.5r-4)-(7.2)=0

We add all the numbers together, and all the variables

.9(-2r+5)+.6(2.5r-4)-7.2=0

We multiply parentheses

-1.8r+1.2r+4.5-2.4-7.2=0

We add all the numbers together, and all the variables

-0.6r-5.1=0

We move all terms containing r to the left, all other terms to the right

-0.6r=5.1

r=5.1/-0.6

r=-8+0.3/0.6

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