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-4x+13=-2(5x+4)
We move all terms to the left:
-4x+13-(-2(5x+4))=0
We calculate terms in parentheses: -(-2(5x+4)), so:We get rid of parentheses
-2(5x+4)
We multiply parentheses
-10x-8
Back to the equation:
-(-10x-8)
-4x+10x+8+13=0
We add all the numbers together, and all the variables
6x+21=0
We move all terms containing x to the left, all other terms to the right
6x=-21
x=-21/6
x=-3+1/2
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