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76=x-3(2x-7)
We move all terms to the left:
76-(x-3(2x-7))=0
We calculate terms in parentheses: -(x-3(2x-7)), so:We get rid of parentheses
x-3(2x-7)
We multiply parentheses
x-6x+21
We add all the numbers together, and all the variables
-5x+21
Back to the equation:
-(-5x+21)
5x-21+76=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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