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20=-8(x+2)-4
We move all terms to the left:
20-(-8(x+2)-4)=0
We calculate terms in parentheses: -(-8(x+2)-4), so:We get rid of parentheses
-8(x+2)-4
We multiply parentheses
-8x-16-4
We add all the numbers together, and all the variables
-8x-20
Back to the equation:
-(-8x-20)
8x+20+20=0
We add all the numbers together, and all the variables
8x+40=0
We move all terms containing x to the left, all other terms to the right
8x=-40
x=-40/8
x=-5
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