4=x+8-7

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Solution for 4=x+8-7 equation: 



4=x+8-7

We move all terms to the left:

4-(x+8-7)=0

We add all the numbers together, and all the variables

-(x+1)+4=0

We get rid of parentheses

-x-1+4=0

We add all the numbers together, and all the variables

-1x+3=0

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

-x=-3

x=-3/-1

x=+3

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