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4u+38=-2(u+2)
We move all terms to the left:
4u+38-(-2(u+2))=0
We calculate terms in parentheses: -(-2(u+2)), so:We get rid of parentheses
-2(u+2)
We multiply parentheses
-2u-4
Back to the equation:
-(-2u-4)
4u+2u+4+38=0
We add all the numbers together, and all the variables
6u+42=0
We move all terms containing u to the left, all other terms to the right
6u=-42
u=-42/6
u=-7
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