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17(-7x-20)=40(x+3)
We move all terms to the left:
17(-7x-20)-(40(x+3))=0
We multiply parentheses
-119x-(40(x+3))-340=0
We calculate terms in parentheses: -(40(x+3)), so:We get rid of parentheses
40(x+3)
We multiply parentheses
40x+120
Back to the equation:
-(40x+120)
-119x-40x-120-340=0
We add all the numbers together, and all the variables
-159x-460=0
We move all terms containing x to the left, all other terms to the right
-159x=460
x=460/-159
x=-2+142/159
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