5x+15=-3-x

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Solution for 5x+15=-3-x equation: 



5x+15=-3-x

We move all terms to the left:

5x+15-(-3-x)=0

We add all the numbers together, and all the variables

5x-(-1x-3)+15=0

We get rid of parentheses

5x+1x+3+15=0

We add all the numbers together, and all the variables

6x+18=0

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

6x=-18

x=-18/6

x=-3

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