Question

1). 5x-3y=1 dan 3x+4y=-1 HITUNGLAH DENGAN METODE ELIMINASI.
2). Y-2x=-4 dan 8x-2y=4 HITUNGLAH DENGAN METODE SUBTITUSI.
PLSSS JAWAB YAAA!!!!

Answer 1

1) 5x - 3y = 1 |×3
3x + 4y = - 1 |×5
15x - 9y = 3
15x + 20y = - 5
-----------------------(-)
- 29y = 8
y = - 8/29

5x - 3y = 1
5x - 3(-8/29) = 1
5x + 24/29 = 1
5x = 1 - 24/29
5x = 5/29
x = 5/145
x = 1/29

hp = {1/29,-8/29}

2) y - 2x = - 4
y = 2x + 4

8x - 2y = 4
8x - 2(2x + 4) = 4
8x - 4x - 8 = 4
4x = 12
x = 3

y = 2x + 4
y = 2(3) + 4
y = 10

hp = {3,10}