Question

Menggunakan Eliminasi
1x + 3y + 7 = 0 dan 2x + 5y = 21 tentukan

Answer 1

x + 3y + 7 = 0
⇔ x+3y = -7   |×2
    2x+5y = 21  | ×1
________________-
6y - 5y = -14-21
y = -35
x + 3(-35) + 7 = 0
x - 105 +7 = 0
x = 98
semoga membantu :)

Answer 2

1x + 3y = -7
2x + 5y = 21
5x + 15y = -35
6x + 15y = 63  -
-x = -98
x = 98

1x + 3y = -7
2x + 5y = 21
2x + 6y = -14
2x + 5y = 21  -
  y = -35