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138=6(3x-4)
We move all terms to the left:
138-(6(3x-4))=0
We calculate terms in parentheses: -(6(3x-4)), so:We get rid of parentheses
6(3x-4)
We multiply parentheses
18x-24
Back to the equation:
-(18x-24)
-18x+24+138=0
We add all the numbers together, and all the variables
-18x+162=0
We move all terms containing x to the left, all other terms to the right
-18x=-162
x=-162/-18
x=+9
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