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15=7(x+1)-6x
We move all terms to the left:
15-(7(x+1)-6x)=0
We calculate terms in parentheses: -(7(x+1)-6x), so:We get rid of parentheses
7(x+1)-6x
We add all the numbers together, and all the variables
-6x+7(x+1)
We multiply parentheses
-6x+7x+7
We add all the numbers together, and all the variables
x+7
Back to the equation:
-(x+7)
-x-7+15=0
We add all the numbers together, and all the variables
-1x+8=0
We move all terms containing x to the left, all other terms to the right
-x=-8
x=-8/-1
x=+8
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