tentukan titik potong dari7x+3y-2=0dan2x-y+15=0

Bab Persamaan Garis
Matematika SMP Kelas VIII

2x - y + 15 = 0
y = 2x + 15

7x + 3y - 2 = 0
7x + 3(2x + 15) - 2 = 0
7x + 6x + 45 - 2 = 0
13x = -42
x = -42/13

y = 2x + 15
y = 2 . (-42/13) + 195/13
y = -84/13 + 195/13
y = 111/13

titik potong = (-42/13, 111/13)