(3x+5)+(7x-8)=81

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Solution for (3x+5)+(7x-8)=81 equation: 



(3x+5)+(7x-8)=81

We move all terms to the left:

(3x+5)+(7x-8)-(81)=0

We get rid of parentheses

3x+7x+5-8-81=0

We add all the numbers together, and all the variables

10x-84=0

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

10x=84

x=84/10

x=8+2/5

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