0.7x+0.9(20-x)=15

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Solution for 0.7x+0.9(20-x)=15 equation: 



0.7x+0.9(20-x)=15

We move all terms to the left:

0.7x+0.9(20-x)-(15)=0

We add all the numbers together, and all the variables

0.7x+0.9(-1x+20)-15=0

We multiply parentheses

0.7x-0.9x+18-15=0

We add all the numbers together, and all the variables

-0.2x+3=0

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

-0.2x=-3

x=-3/-0.2

x=+15

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