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4x+20=-2(3x-5)
We move all terms to the left:
4x+20-(-2(3x-5))=0
We calculate terms in parentheses: -(-2(3x-5)), so:We get rid of parentheses
-2(3x-5)
We multiply parentheses
-6x+10
Back to the equation:
-(-6x+10)
4x+6x-10+20=0
We add all the numbers together, and all the variables
10x+10=0
We move all terms containing x to the left, all other terms to the right
10x=-10
x=-10/10
x=-1
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