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76=3x+7(x-2)
We move all terms to the left:
76-(3x+7(x-2))=0
We calculate terms in parentheses: -(3x+7(x-2)), so:We get rid of parentheses
3x+7(x-2)
We multiply parentheses
3x+7x-14
We add all the numbers together, and all the variables
10x-14
Back to the equation:
-(10x-14)
-10x+14+76=0
We add all the numbers together, and all the variables
-10x+90=0
We move all terms containing x to the left, all other terms to the right
-10x=-90
x=-90/-10
x=+9
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