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130=-5x+7(-x-2)
We move all terms to the left:
130-(-5x+7(-x-2))=0
We add all the numbers together, and all the variables
-(-5x+7(-1x-2))+130=0
We calculate terms in parentheses: -(-5x+7(-1x-2)), so:We get rid of parentheses
-5x+7(-1x-2)
We multiply parentheses
-5x-7x-14
We add all the numbers together, and all the variables
-12x-14
Back to the equation:
-(-12x-14)
12x+14+130=0
We add all the numbers together, and all the variables
12x+144=0
We move all terms containing x to the left, all other terms to the right
12x=-144
x=-144/12
x=-12
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