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30=4(x-4)
We move all terms to the left:
30-(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)
-4x+16+30=0
We add all the numbers together, and all the variables
-4x+46=0
We move all terms containing x to the left, all other terms to the right
-4x=-46
x=-46/-4
x=11+1/2
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