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-10x+4x=-2(10x+10)-4(-7x+2)
We move all terms to the left:
-10x+4x-(-2(10x+10)-4(-7x+2))=0
We add all the numbers together, and all the variables
-6x-(-2(10x+10)-4(-7x+2))=0
We calculate terms in parentheses: -(-2(10x+10)-4(-7x+2)), so:We get rid of parentheses
-2(10x+10)-4(-7x+2)
We multiply parentheses
-20x+28x-20-8
We add all the numbers together, and all the variables
8x-28
Back to the equation:
-(8x-28)
-6x-8x+28=0
We add all the numbers together, and all the variables
-14x+28=0
We move all terms containing x to the left, all other terms to the right
-14x=-28
x=-28/-14
x=+2
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