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48=4+3u
We move all terms to the left:
48-(4+3u)=0
We add all the numbers together, and all the variables
-(3u+4)+48=0
We get rid of parentheses
-3u-4+48=0
We add all the numbers together, and all the variables
-3u+44=0
We move all terms containing u to the left, all other terms to the right
-3u=-44
u=-44/-3
u=14+2/3
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