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-5u+35=2(u-7)
We move all terms to the left:
-5u+35-(2(u-7))=0
We calculate terms in parentheses: -(2(u-7)), so:We get rid of parentheses
2(u-7)
We multiply parentheses
2u-14
Back to the equation:
-(2u-14)
-5u-2u+14+35=0
We add all the numbers together, and all the variables
-7u+49=0
We move all terms containing u to the left, all other terms to the right
-7u=-49
u=-49/-7
u=+7
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