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5-u/4=3
We move all terms to the left:
5-u/4-(3)=0
We add all the numbers together, and all the variables
-u/4+2=0
We multiply all the terms by the denominator
-u+2*4=0
We add all the numbers together, and all the variables
-1u+8=0
We move all terms containing u to the left, all other terms to the right
-u=-8
u=-8/-1
u=+8
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