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