3(x-30+40)=-4x

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Solution for 3(x-30+40)=-4x equation: 



3(x-30+40)=-4x

We move all terms to the left:

3(x-30+40)-(-4x)=0

We add all the numbers together, and all the variables

3(x+10)-(-4x)=0

We multiply parentheses

3x-(-4x)+30=0

We get rid of parentheses

3x+4x+30=0

We add all the numbers together, and all the variables

7x+30=0

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

7x=-30

x=-30/7

x=-4+2/7

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