3u+4u=40

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Solution for 3u+4u=40 equation: 



3u+4u=40

We move all terms to the left:

3u+4u-(40)=0

We add all the numbers together, and all the variables

7u-40=0

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

7u=40

u=40/7

u=5+5/7

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