10u-21=7

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Solution for 10u-21=7 equation: 



10u-21=7

We move all terms to the left:

10u-21-(7)=0

We add all the numbers together, and all the variables

10u-28=0

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

10u=28

u=28/10

u=2+4/5

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