9u-1=-9+7u

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Solution for 9u-1=-9+7u equation:



9u-1=-9+7u
We move all terms to the left:
9u-1-(-9+7u)=0
We add all the numbers together, and all the variables
9u-(7u-9)-1=0
We get rid of parentheses
9u-7u+9-1=0
We add all the numbers together, and all the variables
2u+8=0
We move all terms containing u to the left, all other terms to the right
2u=-8
u=-8/2
u=-4

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