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7.5u-19.23=18.72+13u
We move all terms to the left:
7.5u-19.23-(18.72+13u)=0
We add all the numbers together, and all the variables
7.5u-(13u+18.72)-19.23=0
We get rid of parentheses
7.5u-13u-18.72-19.23=0
We add all the numbers together, and all the variables
-5.5u-37.95=0
We move all terms containing u to the left, all other terms to the right
-5.5u=37.95
u=37.95/-5.5
u=-6+2.5384615384615/2.8205128205128
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