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-4=4(u+3)-6u
We move all terms to the left:
-4-(4(u+3)-6u)=0
We calculate terms in parentheses: -(4(u+3)-6u), so:We get rid of parentheses
4(u+3)-6u
We add all the numbers together, and all the variables
-6u+4(u+3)
We multiply parentheses
-6u+4u+12
We add all the numbers together, and all the variables
-2u+12
Back to the equation:
-(-2u+12)
2u-12-4=0
We add all the numbers together, and all the variables
2u-16=0
We move all terms containing u to the left, all other terms to the right
2u=16
u=16/2
u=8
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