7u+(-10)+(-u)=20

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Solution for 7u+(-10)+(-u)=20 equation: 



7u+(-10)+(-u)=20

We move all terms to the left:

7u+(-10)+(-u)-(20)=0

determiningTheFunctionDomain
7u+(-u)-20+(-10)=0

We add all the numbers together, and all the variables

7u+(-1u)-20+(-10)=0

We add all the numbers together, and all the variables

7u+(-1u)-30=0

We get rid of parentheses

7u-1u-30=0

We add all the numbers together, and all the variables

6u-30=0

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

6u=30

u=30/6

u=5

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