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5.5+u=9/4
We move all terms to the left:
5.5+u-(9/4)=0
We add all the numbers together, and all the variables
u+5.5-(+9/4)=0
We get rid of parentheses
u+5.5-9/4=0
We multiply all the terms by the denominator
u*4-9+(5.5)*4=0
We add all the numbers together, and all the variables
u*4+13=0
Wy multiply elements
4u+13=0
We move all terms containing u to the left, all other terms to the right
4u=-13
u=-13/4
u=-3+1/4
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