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23=-2(x+5)-9x
We move all terms to the left:
23-(-2(x+5)-9x)=0
We calculate terms in parentheses: -(-2(x+5)-9x), so:We get rid of parentheses
-2(x+5)-9x
We add all the numbers together, and all the variables
-9x-2(x+5)
We multiply parentheses
-9x-2x-10
We add all the numbers together, and all the variables
-11x-10
Back to the equation:
-(-11x-10)
11x+10+23=0
We add all the numbers together, and all the variables
11x+33=0
We move all terms containing x to the left, all other terms to the right
11x=-33
x=-33/11
x=-3
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