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10u=4.2/16
We move all terms to the left:
10u-(4.2/16)=0
We add all the numbers together, and all the variables
10u-(+4.2/16)=0
We get rid of parentheses
10u-4.2/16=0
We multiply all the terms by the denominator
10u*16-4.2=0
Wy multiply elements
160u-4.2=0
We move all terms containing u to the left, all other terms to the right
160u=4.2
u=4.2/160
u=1/38.095238095238
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