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206=4x+2(6x+39)
We move all terms to the left:
206-(4x+2(6x+39))=0
We calculate terms in parentheses: -(4x+2(6x+39)), so:We get rid of parentheses
4x+2(6x+39)
We multiply parentheses
4x+12x+78
We add all the numbers together, and all the variables
16x+78
Back to the equation:
-(16x+78)
-16x-78+206=0
We add all the numbers together, and all the variables
-16x+128=0
We move all terms containing x to the left, all other terms to the right
-16x=-128
x=-128/-16
x=+8
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