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158=-7x-2(6x-22)
We move all terms to the left:
158-(-7x-2(6x-22))=0
We calculate terms in parentheses: -(-7x-2(6x-22)), so:We get rid of parentheses
-7x-2(6x-22)
We multiply parentheses
-7x-12x+44
We add all the numbers together, and all the variables
-19x+44
Back to the equation:
-(-19x+44)
19x-44+158=0
We add all the numbers together, and all the variables
19x+114=0
We move all terms containing x to the left, all other terms to the right
19x=-114
x=-114/19
x=-6
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