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2=-2(u+-42)
We move all terms to the left:
2-(-2(u+-42))=0
We add all the numbers together, and all the variables
-(-2(u-42))+2=0
We calculate terms in parentheses: -(-2(u-42)), so:We get rid of parentheses
-2(u-42)
We multiply parentheses
-2u+84
Back to the equation:
-(-2u+84)
2u-84+2=0
We add all the numbers together, and all the variables
2u-82=0
We move all terms containing u to the left, all other terms to the right
2u=82
u=82/2
u=41
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