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.9u=12.25u
We move all terms to the left:
.9u-(12.25u)=0
We add all the numbers together, and all the variables
.9u-(+12.25u)=0
We get rid of parentheses
.9u-12.25u=0
We add all the numbers together, and all the variables
-11.35u=0
u=0/-11.35
u=0
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