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76=-7u+6(u+12)
We move all terms to the left:
76-(-7u+6(u+12))=0
We calculate terms in parentheses: -(-7u+6(u+12)), so:We get rid of parentheses
-7u+6(u+12)
We multiply parentheses
-7u+6u+72
We add all the numbers together, and all the variables
-1u+72
Back to the equation:
-(-1u+72)
1u-72+76=0
We add all the numbers together, and all the variables
u+4=0
We move all terms containing u to the left, all other terms to the right
u=-4
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