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78=6(x-5)
We move all terms to the left:
78-(6(x-5))=0
We calculate terms in parentheses: -(6(x-5)), so:We get rid of parentheses
6(x-5)
We multiply parentheses
6x-30
Back to the equation:
-(6x-30)
-6x+30+78=0
We add all the numbers together, and all the variables
-6x+108=0
We move all terms containing x to the left, all other terms to the right
-6x=-108
x=-108/-6
x=+18
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