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8u+8=-40u-7
We move all terms to the left:
8u+8-(-40u-7)=0
We get rid of parentheses
8u+40u+7+8=0
We add all the numbers together, and all the variables
48u+15=0
We move all terms containing u to the left, all other terms to the right
48u=-15
u=-15/48
u=-5/16
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