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-6u+38=-4(u-7)
We move all terms to the left:
-6u+38-(-4(u-7))=0
We calculate terms in parentheses: -(-4(u-7)), so:We get rid of parentheses
-4(u-7)
We multiply parentheses
-4u+28
Back to the equation:
-(-4u+28)
-6u+4u-28+38=0
We add all the numbers together, and all the variables
-2u+10=0
We move all terms containing u to the left, all other terms to the right
-2u=-10
u=-10/-2
u=+5
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