Question

Tolong ya
2x-3y=8
x+2y=-3
himpunan penyelesaian nya adalah.....

Answer 1

Metode subtistusi ( mengganti )
x + 2y = -3
x = -3 - 2y

2x -3y = 8
2( -3 -2y) - 3y = 8
-6 - 4y - 3y = 8
-7y = 8 + 6
-7y = 14
y = -2

x = -3 -2y
x = -3 - 2 ( -2)
x = -3 + 4
x = 1

Hp = { 1, -2 }