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-4.3=8.5+u/8
We move all terms to the left:
-4.3-(8.5+u/8)=0
We add all the numbers together, and all the variables
-(u/8+8.5)-4.3=0
We get rid of parentheses
-u/8-8.5-4.3=0
We multiply all the terms by the denominator
-u-(8.5)*8-(4.3)*8=0
We add all the numbers together, and all the variables
-1u-102.4=0
We move all terms containing u to the left, all other terms to the right
-u=102.4
u=102.4/-1
u=-102+0.4/1
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