2x - y =5 x + 3y = -1

Bab Persamaan Linear
Matematika SMP Kelas VIII

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

x + 3y = -1
x + 3(2x - 5) = -1
x + 6x - 15 = -1
7x = -1 + 15
x = 14/7
x = 2

y = 2x - 5
y = 2 . 2 - 5
y = 4 - 5
y = -1

HP = {(2, -1)}