7=x+3+5

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Solution for 7=x+3+5 equation: 



7=x+3+5

We move all terms to the left:

7-(x+3+5)=0

We add all the numbers together, and all the variables

-(x+8)+7=0

We get rid of parentheses

-x-8+7=0

We add all the numbers together, and all the variables

-1x-1=0

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

-x=1

x=1/-1

x=-1

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