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x-7=4(x-4)
We move all terms to the left:
x-7-(4(x-4))=0
We calculate terms in parentheses: -(4(x-4)), so:We get rid of parentheses
4(x-4)
We multiply parentheses
4x-16
Back to the equation:
-(4x-16)
x-4x+16-7=0
We add all the numbers together, and all the variables
-3x+9=0
We move all terms containing x to the left, all other terms to the right
-3x=-9
x=-9/-3
x=+3
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