7x + 3y = 13 dan 3x - y = 6 jadikan ke metode subsitusi tolong dibantu makasi :)

3x - y = 6
3x - 6 = y

7x + 3y = 13
7x + 3(3x-6) = 13
7x + 9x - 18 = 13
16x = 31
x = 31/16

y = 3x - 6
y = 3(31/16) - 6
y = 93/16 - 6
y = 93/16 - 96/16
y = -3/16

Bab Persamaan Linear
Matematika SMP Kelas VIII

3x - y = 6
y = 3x - 6

7x + 3y = 13
7x + 3 (3x - 6) = 13
7x + 9x - 18 = 13
16x = 13 + 18
x = 31/16

y = 3x - 16
y = 3 . 31/16 - 256/16
y = (93 - 256)/16
y = -163/16

titik potong = (31/16, -163/16)