7u+21+5u-30=5u

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Solution for 7u+21+5u-30=5u equation: 



7u+21+5u-30=5u

We move all terms to the left:

7u+21+5u-30-(5u)=0

We add all the numbers together, and all the variables

7u-9=0

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

7u=9

u=9/7

u=1+2/7

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