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-151=-2x+7(-x-10)
We move all terms to the left:
-151-(-2x+7(-x-10))=0
We add all the numbers together, and all the variables
-(-2x+7(-1x-10))-151=0
We calculate terms in parentheses: -(-2x+7(-1x-10)), so:We get rid of parentheses
-2x+7(-1x-10)
We multiply parentheses
-2x-7x-70
We add all the numbers together, and all the variables
-9x-70
Back to the equation:
-(-9x-70)
9x+70-151=0
We add all the numbers together, and all the variables
9x-81=0
We move all terms containing x to the left, all other terms to the right
9x=81
x=81/9
x=9
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