Plisss tolong bntu ya... Tolong sertakan caranya

7x - 9y = 8
2x - 15y = 4

14x - 18y = 16
14x - 105 y = 28
------------------------ -
- 87y = -12
87y = 12
y = 87/12
y = 7.25

7x - 9(7.25) = 8
7x - 65.25 = 8
7x = 65.25 + 8
x = 73.25 / 7
= 10.464

maaf kalau salah