-7u-7=-9u-15

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Solution for -7u-7=-9u-15 equation: 



-7u-7=-9u-15

We move all terms to the left:

-7u-7-(-9u-15)=0

We get rid of parentheses

-7u+9u+15-7=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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