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