15u-7u=-8

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Solution for 15u-7u=-8 equation: 



15u-7u=-8

We move all terms to the left:

15u-7u-(-8)=0

We add all the numbers together, and all the variables

8u+8=0

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

8u=-8

u=-8/8

u=-1

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