-10x=-7x+21

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Solution for -10x=-7x+21 equation: 



-10x=-7x+21

We move all terms to the left:

-10x-(-7x+21)=0

We get rid of parentheses

-10x+7x-21=0

We add all the numbers together, and all the variables

-3x-21=0

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

-3x=21

x=21/-3

x=-7

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