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-5u+8=-3(u+4)
We move all terms to the left:
-5u+8-(-3(u+4))=0
We calculate terms in parentheses: -(-3(u+4)), so:We get rid of parentheses
-3(u+4)
We multiply parentheses
-3u-12
Back to the equation:
-(-3u-12)
-5u+3u+12+8=0
We add all the numbers together, and all the variables
-2u+20=0
We move all terms containing u to the left, all other terms to the right
-2u=-20
u=-20/-2
u=+10
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