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-8u+2(u+5)=22
We move all terms to the left:
-8u+2(u+5)-(22)=0
We multiply parentheses
-8u+2u+10-22=0
We add all the numbers together, and all the variables
-6u-12=0
We move all terms containing u to the left, all other terms to the right
-6u=12
u=12/-6
u=-2
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