4x+3=-3x-18

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Solution for 4x+3=-3x-18 equation: 



4x+3=-3x-18

We move all terms to the left:

4x+3-(-3x-18)=0

We get rid of parentheses

4x+3x+18+3=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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