Tentukan HPnya: a.) [tex]4x - 5y = 22[/tex] b [tex]7x + 3y = 15[/tex] Tolong ya pake cara, makasih

4x -5y= 22 |×3
7x+3y = 15 |×5

12x -15y = 66
35x +15y = 75
____________+
47x = 141
x = 141/47
x = 3


7x+3y = 15
(7×3)+3y = 15
3y = 15-21
3y = -6
y = -6/3
y = -2

jadi hp ={3,-2}