tentukan penyelesaian x+2y=5 dan 4y-3x=16

Kelas 8 Matematika
Bab Barisan dan Deret

x + 2y = 5
x = -2y + 5

4y - 3x = 16
4y - 3 (-2y + 5) = 16
4y + 6y - 15 = 16
10y = 16 + 15
y = 31/10

x = -2y + 5
x = -2 . 31/10 + 25/5
x = -31/5 + 25/5
x = -6/5

(-6/5, 31/10)