7(3-u)+u=-7u+12

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Solution for 7(3-u)+u=-7u+12 equation: 



7(3-u)+u=-7u+12

We move all terms to the left:

7(3-u)+u-(-7u+12)=0

We add all the numbers together, and all the variables

7(-1u+3)+u-(-7u+12)=0

We add all the numbers together, and all the variables

u+7(-1u+3)-(-7u+12)=0

We multiply parentheses

u-7u-(-7u+12)+21=0

We get rid of parentheses

u-7u+7u-12+21=0

We add all the numbers together, and all the variables

u+9=0

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

u=-9

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