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-90=-5(-6-4x)
We move all terms to the left:
-90-(-5(-6-4x))=0
We add all the numbers together, and all the variables
-(-5(-4x-6))-90=0
We calculate terms in parentheses: -(-5(-4x-6)), so:We get rid of parentheses
-5(-4x-6)
We multiply parentheses
20x+30
Back to the equation:
-(20x+30)
-20x-30-90=0
We add all the numbers together, and all the variables
-20x-120=0
We move all terms containing x to the left, all other terms to the right
-20x=120
x=120/-20
x=-6
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