x+77=8x+21

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Solution for x+77=8x+21 equation: 



x+77=8x+21

We move all terms to the left:

x+77-(8x+21)=0

We get rid of parentheses

x-8x-21+77=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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