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