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-8(u+4)+10(2u-3)-5(u+13=15u+1
We move all terms to the left:
-8(u+4)+10(2u-3)-5(u+13-(15u+1)=0
We multiply parentheses
-8u+20u-5(u+13-(15u+1)-32-30=0
We add all the numbers together, and all the variables
12u-5(u+13-(15u+1)-32-30=0
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