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-7=2(x+7)+5x
We move all terms to the left:
-7-(2(x+7)+5x)=0
We calculate terms in parentheses: -(2(x+7)+5x), so:We get rid of parentheses
2(x+7)+5x
We add all the numbers together, and all the variables
5x+2(x+7)
We multiply parentheses
5x+2x+14
We add all the numbers together, and all the variables
7x+14
Back to the equation:
-(7x+14)
-7x-14-7=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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