Question

Dengan metode substitusi
x + y = -6
2x - y= -1

Answer 1

Verified answer

X + y = -6
2x - y = -1

x + y = -6
x = -y - 6

2x - y = -1
2 (-y - 6) - y = -1
-2y - 12 - y = -1
-3y - 12 = -1
-3y = -1 + 12
-3y = 11
y = 11/-3

x + y = -6
x + 11/-3 = -6
x = -6 - 11/-3
x = 18/-3 - 11/-3
x = 7/-3

Answer 2

x+y=-6 ubah menjadi x=-6-y

substitusikan ke

2x-y=-1

2(-6-y)-y=-1

-12 -2y -y =-1

-3y = -1 +12

y = 11/-3

substitusikan ke

x= -6 - y

x = -6 - (11/-3)

x= -6 + 11/3

x = -18+11/3

x= -7/3

jadi nilai x = -7/3 dan y = -11/3