6-4y=21

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Solution for 6-4y=21 equation: 



6-4y=21

We move all terms to the left:

6-4y-(21)=0

We add all the numbers together, and all the variables

-4y-15=0

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

-4y=15

y=15/-4

y=-3+3/4

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