3(x+10)=-7x

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Solution for 3(x+10)=-7x equation: 



3(x+10)=-7x

We move all terms to the left:

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

We multiply parentheses

3x-(-7x)+30=0

We get rid of parentheses

3x+7x+30=0

We add all the numbers together, and all the variables

10x+30=0

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

10x=-30

x=-30/10

x=-3

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