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