7y+4y=21

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Solution for 7y+4y=21 equation: 



7y+4y=21

We move all terms to the left:

7y+4y-(21)=0

We add all the numbers together, and all the variables

11y-21=0

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

11y=21

y=21/11

y=1+10/11

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