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-5u+17=-2(u+5)
We move all terms to the left:
-5u+17-(-2(u+5))=0
We calculate terms in parentheses: -(-2(u+5)), so:We get rid of parentheses
-2(u+5)
We multiply parentheses
-2u-10
Back to the equation:
-(-2u-10)
-5u+2u+10+17=0
We add all the numbers together, and all the variables
-3u+27=0
We move all terms containing u to the left, all other terms to the right
-3u=-27
u=-27/-3
u=+9
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