-3(x+10)=-21

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Solution for -3(x+10)=-21 equation: 



-3(x+10)=-21

We move all terms to the left:

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

We add all the numbers together, and all the variables

-3(x+10)+21=0

We multiply parentheses

-3x-30+21=0

We add all the numbers together, and all the variables

-3x-9=0

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

-3x=9

x=9/-3

x=-3

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