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20+5x=8x-7(8-5x)
We move all terms to the left:
20+5x-(8x-7(8-5x))=0
We add all the numbers together, and all the variables
5x-(8x-7(-5x+8))+20=0
We calculate terms in parentheses: -(8x-7(-5x+8)), so:We get rid of parentheses
8x-7(-5x+8)
We multiply parentheses
8x+35x-56
We add all the numbers together, and all the variables
43x-56
Back to the equation:
-(43x-56)
5x-43x+56+20=0
We add all the numbers together, and all the variables
-38x+76=0
We move all terms containing x to the left, all other terms to the right
-38x=-76
x=-76/-38
x=+2
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