84+9y=-21

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Solution for 84+9y=-21 equation: 



84+9y=-21

We move all terms to the left:

84+9y-(-21)=0

We add all the numbers together, and all the variables

9y+105=0

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

9y=-105

y=-105/9

y=-11+2/3

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