10y+9=8y-7

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Solution for 10y+9=8y-7 equation: 



10y+9=8y-7

We move all terms to the left:

10y+9-(8y-7)=0

We get rid of parentheses

10y-8y+7+9=0

We add all the numbers together, and all the variables

2y+16=0

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

2y=-16

y=-16/2

y=-8

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