Tentukan koordinat titik potong antara garis x + 2y=4 dan garis 2x-3y=-13

jawab

x + 2y = 4 ......kali 2
2x - 3y= -13

2x + 4y = 8
2x - 3y = -13 .......(-)
7y =  21
y = 3

x + 2y= 4
x+ 6 = 4
x = 2

titik potong (x,y) = (2, 3)