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-13-x=-6x-7(7-2x)
We move all terms to the left:
-13-x-(-6x-7(7-2x))=0
We add all the numbers together, and all the variables
-x-(-6x-7(-2x+7))-13=0
We add all the numbers together, and all the variables
-1x-(-6x-7(-2x+7))-13=0
We calculate terms in parentheses: -(-6x-7(-2x+7)), so:We get rid of parentheses
-6x-7(-2x+7)
We multiply parentheses
-6x+14x-49
We add all the numbers together, and all the variables
8x-49
Back to the equation:
-(8x-49)
-1x-8x+49-13=0
We add all the numbers together, and all the variables
-9x+36=0
We move all terms containing x to the left, all other terms to the right
-9x=-36
x=-36/-9
x=+4
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