7y+9=-7y-9

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Solution for 7y+9=-7y-9 equation: 



7y+9=-7y-9

We move all terms to the left:

7y+9-(-7y-9)=0

We get rid of parentheses

7y+7y+9+9=0

We add all the numbers together, and all the variables

14y+18=0

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

14y=-18

y=-18/14

y=-1+2/7

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