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-4(5+5x)=-140
We move all terms to the left:
-4(5+5x)-(-140)=0
We add all the numbers together, and all the variables
-4(5x+5)-(-140)=0
We add all the numbers together, and all the variables
-4(5x+5)+140=0
We multiply parentheses
-20x-20+140=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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