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2(u-2)-5u=20
We move all terms to the left:
2(u-2)-5u-(20)=0
We add all the numbers together, and all the variables
-5u+2(u-2)-20=0
We multiply parentheses
-5u+2u-4-20=0
We add all the numbers together, and all the variables
-3u-24=0
We move all terms containing u to the left, all other terms to the right
-3u=24
u=24/-3
u=-8
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