4y+5y=45

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Solution for 4y+5y=45 equation: 



4y+5y=45

We move all terms to the left:

4y+5y-(45)=0

We add all the numbers together, and all the variables

9y-45=0

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

9y=45

y=45/9

y=5

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