30+40u=10u

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Solution for 30+40u=10u equation: 



30+40u=10u

We move all terms to the left:

30+40u-(10u)=0

We add all the numbers together, and all the variables

30u+30=0

We move all terms containing u to the left, all other terms to the right

30u=-30

u=-30/30

u=-1

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