7.1=8.7-0.8x

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Solution for 7.1=8.7-0.8x equation: 



7.1=8.7-0.8x

We move all terms to the left:

7.1-(8.7-0.8x)=0

We add all the numbers together, and all the variables

-(-0.8x+8.7)+7.1=0

We get rid of parentheses

0.8x-8.7+7.1=0

We add all the numbers together, and all the variables

0.8x-1.6=0

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

0.8x=1.6

x=1.6/0.8

x=2

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