metode subsitusix-2y=2 dan 4x-2y=-6

Bab SPLDV
Matematika SMP Kelas VIII

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

4x - 2y = 6
4(2y + 2) - 2y = 6
8y + 8 - 2y = 6
6y = 6 - 8
y = -2/6
y = -1/3

x = 2y + 2
x = 2 . (-1/3) + 2
x = -2/3 + 6/3
x = 4/3

(4/3, -1/3)

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

x-2y=2
x-2(7/3)=2
x-14/3=2
x=14/3+2
x=20/3