book Maths Puzzle Numerical Ability

I need to know how to graph
x+2y=3
3x-y=-5

And I also need to know how many solutions it has.
Could you please help me? thanks!

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book Other Question
Furst of all, thank you for all the recent help-I think I may be getting this, but, of course, something else has come up and has stopped me. May I ask for help with this?:
in sol Need help solving:

-3x +3/4=1/8

Thanks