4x+3=-3x+87

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Solution for 4x+3=-3x+87 equation: 



4x+3=-3x+87

We move all terms to the left:

4x+3-(-3x+87)=0

We get rid of parentheses

4x+3x-87+3=0

We add all the numbers together, and all the variables

7x-84=0

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

7x=84

x=84/7

x=12

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