⚠️HELP PLEASE WILL GOVE BRAINLIST⚠️

Answer:
10. x=3 and y=0
11. Infinitely many solutions.
12. No solutions.
13. x=3/2 and y=-12
14. Infinitely many solutions
15. x=0 and y=−2
Step-by-step explanation:
I just solved them by solving the top part first then the bottom part, I can not put in the actual steps because it takes up way to much space