21.9+4y=7y+15

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Solution for 21.9+4y=7y+15 equation: 



21.9+4y=7y+15

We move all terms to the left:

21.9+4y-(7y+15)=0

We get rid of parentheses

4y-7y-15+21.9=0

We add all the numbers together, and all the variables

-3y+6.9=0

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

-3y=-6.9

y=-6.9/-3

y=2+0.9/3

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