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-5u+2(u+2)=1
We move all terms to the left:
-5u+2(u+2)-(1)=0
We multiply parentheses
-5u+2u+4-1=0
We add all the numbers together, and all the variables
-3u+3=0
We move all terms containing u to the left, all other terms to the right
-3u=-3
u=-3/-3
u=1
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