10y+9-7y-7=7y-9-8y+7

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



10y+9-7y-7=7y-9-8y+7

We move all terms to the left:

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

We add all the numbers together, and all the variables

10y-7y-(-1y-2)+9-7=0

We add all the numbers together, and all the variables

3y-(-1y-2)+2=0

We get rid of parentheses

3y+1y+2+2=0

We add all the numbers together, and all the variables

4y+4=0

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

4y=-4

y=-4/4

y=-1

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