10x+81=21x+4

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Solution for 10x+81=21x+4 equation: 



10x+81=21x+4

We move all terms to the left:

10x+81-(21x+4)=0

We get rid of parentheses

10x-21x-4+81=0

We add all the numbers together, and all the variables

-11x+77=0

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

-11x=-77

x=-77/-11

x=+7

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