7y+2y=50+31

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Solution for 7y+2y=50+31 equation: 



7y+2y=50+31

We move all terms to the left:

7y+2y-(50+31)=0

We add all the numbers together, and all the variables

7y+2y-81=0

We add all the numbers together, and all the variables

9y-81=0

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

9y=81

y=81/9

y=9

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