8u+-9=-7u+7

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Solution for 8u+-9=-7u+7 equation: 



8u+-9=-7u+7

We move all terms to the left:

8u+-9-(-7u+7)=0

We add all the numbers together, and all the variables

8u-(-7u+7)=0

We get rid of parentheses

8u+7u-7=0

We add all the numbers together, and all the variables

15u-7=0

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

15u=7

u=7/15

u=7/15

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