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28=2(-12-x)
We move all terms to the left:
28-(2(-12-x))=0
We add all the numbers together, and all the variables
-(2(-1x-12))+28=0
We calculate terms in parentheses: -(2(-1x-12)), so:We get rid of parentheses
2(-1x-12)
We multiply parentheses
-2x-24
Back to the equation:
-(-2x-24)
2x+24+28=0
We add all the numbers together, and all the variables
2x+52=0
We move all terms containing x to the left, all other terms to the right
2x=-52
x=-52/2
x=-26
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