Can someone please check my work for me.

Question

Q: Plot the graph of the equations 2x - 3y = 5 and 4x - 6y = 21 and interpret the result.
A: 6(2x ¨C 3y = 5) = 12x ¨C 18y = 30
3(4x - 6y = 21) = 12x - 18y = 63

12x ¨C 18y = 30
+ 12x - 18y = 63
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Answer 1

How many solutions does the system of equations below have?

10x – 9y = -10
20x – 18y = -20