81=3x+10+4x+15

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Solution for 81=3x+10+4x+15 equation: 



81=3x+10+4x+15

We move all terms to the left:

81-(3x+10+4x+15)=0

We add all the numbers together, and all the variables

-(7x+25)+81=0

We get rid of parentheses

-7x-25+81=0

We add all the numbers together, and all the variables

-7x+56=0

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

-7x=-56

x=-56/-7

x=+8

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