-10x=-3x-21

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Solution for -10x=-3x-21 equation: 



-10x=-3x-21

We move all terms to the left:

-10x-(-3x-21)=0

We get rid of parentheses

-10x+3x+21=0

We add all the numbers together, and all the variables

-7x+21=0

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

-7x=-21

x=-21/-7

x=+3

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