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2x-9=4(x-9)
We move all terms to the left:
2x-9-(4(x-9))=0
We calculate terms in parentheses: -(4(x-9)), so:We get rid of parentheses
4(x-9)
We multiply parentheses
4x-36
Back to the equation:
-(4x-36)
2x-4x+36-9=0
We add all the numbers together, and all the variables
-2x+27=0
We move all terms containing x to the left, all other terms to the right
-2x=-27
x=-27/-2
x=13+1/2
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