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-139=2x+5(-5x+9)
We move all terms to the left:
-139-(2x+5(-5x+9))=0
We calculate terms in parentheses: -(2x+5(-5x+9)), so:We get rid of parentheses
2x+5(-5x+9)
We multiply parentheses
2x-25x+45
We add all the numbers together, and all the variables
-23x+45
Back to the equation:
-(-23x+45)
23x-45-139=0
We add all the numbers together, and all the variables
23x-184=0
We move all terms containing x to the left, all other terms to the right
23x=184
x=184/23
x=8
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