Question 677856
Need help getting y by itself?

2x-3y=9

x+2y-4=0

3x+4y=12

im not sure wether i need to simplfy them or leave them as they are, please help me, thank you
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"getting y by itself" means getting it on one side of the equal sign.
Do what it take to do that.
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2x-3y=9
Add 3y to both sides.
Divide by 3.
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x+2y-4=0
Add 4
subtract x
divide by 2
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3x+4y=12
similar to the 2 above.