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22.2=-15.3+3u
We move all terms to the left:
22.2-(-15.3+3u)=0
We add all the numbers together, and all the variables
-(3u-15.3)+22.2=0
We get rid of parentheses
-3u+15.3+22.2=0
We add all the numbers together, and all the variables
-3u+37.5=0
We move all terms containing u to the left, all other terms to the right
-3u=-37.5
u=-37.5/-3
u=12+1/2
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