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-28=-6u+4(u-4)
We move all terms to the left:
-28-(-6u+4(u-4))=0
We calculate terms in parentheses: -(-6u+4(u-4)), so:We get rid of parentheses
-6u+4(u-4)
We multiply parentheses
-6u+4u-16
We add all the numbers together, and all the variables
-2u-16
Back to the equation:
-(-2u-16)
2u+16-28=0
We add all the numbers together, and all the variables
2u-12=0
We move all terms containing u to the left, all other terms to the right
2u=12
u=12/2
u=6
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