2x+81=15x+42

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Solution for 2x+81=15x+42 equation: 



2x+81=15x+42

We move all terms to the left:

2x+81-(15x+42)=0

We get rid of parentheses

2x-15x-42+81=0

We add all the numbers together, and all the variables

-13x+39=0

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

-13x=-39

x=-39/-13

x=+3

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