7+8=x-4

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Solution for 7+8=x-4 equation: 



7+8=x-4

We move all terms to the left:

7+8-(x-4)=0

We add all the numbers together, and all the variables

-(x-4)+15=0

We get rid of parentheses

-x+4+15=0

We add all the numbers together, and all the variables

-1x+19=0

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

-x=-19

x=-19/-1

x=+19

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