Question

Tentukan dengan metode eliminasi dari 2x+3y=5 dan x+y=2

Answer 1

2x + 3y = 5 |×1|
x + y = 2 |×2|

2x + 3y = 5
2x + 2y = 4
--------- -
y = 1

2x + 3y = 5 |×1|
x + y = 2 |×3|

2x + 3y = 5
3x + 3y = 6
--------- -
-x = -1 |×-1|
x = 1

Answer 2

2x+3y = 5 |x1| 2x+3y = 5
x+y = 2 |x2|    2x+2y = 4 _
                   ----------------
                     y = 1

x+y = 2
x = 2-y = 2-1 = 1