10y-3y=-21

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Solution for 10y-3y=-21 equation: 



10y-3y=-21

We move all terms to the left:

10y-3y-(-21)=0

We add all the numbers together, and all the variables

7y+21=0

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

7y=-21

y=-21/7

y=-3

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