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71=3x-4(2x-4)
We move all terms to the left:
71-(3x-4(2x-4))=0
We calculate terms in parentheses: -(3x-4(2x-4)), so:We get rid of parentheses
3x-4(2x-4)
We multiply parentheses
3x-8x+16
We add all the numbers together, and all the variables
-5x+16
Back to the equation:
-(-5x+16)
5x-16+71=0
We add all the numbers together, and all the variables
5x+55=0
We move all terms containing x to the left, all other terms to the right
5x=-55
x=-55/5
x=-11
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