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5u+7=20+3
We move all terms to the left:
5u+7-(20+3)=0
We add all the numbers together, and all the variables
5u+7-23=0
We add all the numbers together, and all the variables
5u-16=0
We move all terms containing u to the left, all other terms to the right
5u=16
u=16/5
u=3+1/5
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