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-2.4=-0.8u+0.2u
We move all terms to the left:
-2.4-(-0.8u+0.2u)=0
We add all the numbers together, and all the variables
-(-0.6u)-2.4=0
We get rid of parentheses
0.6u-2.4=0
We move all terms containing u to the left, all other terms to the right
0.6u=2.4
u=2.4/0.6
u=4
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