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-8x+6(x+4)=20
We move all terms to the left:
-8x+6(x+4)-(20)=0
We multiply parentheses
-8x+6x+24-20=0
We add all the numbers together, and all the variables
-2x+4=0
We move all terms containing x to the left, all other terms to the right
-2x=-4
x=-4/-2
x=+2
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