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.64-8.1u=-9.2u-10.8
We move all terms to the left:
.64-8.1u-(-9.2u-10.8)=0
We add all the numbers together, and all the variables
-8.1u-(-9.2u-10.8)+0.64=0
We get rid of parentheses
-8.1u+9.2u+10.8+0.64=0
We add all the numbers together, and all the variables
1.1u+11.44=0
We move all terms containing u to the left, all other terms to the right
1.1u=-11.44
u=-11.44/1.1
u=-10+0.44/1.1
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