Question

Cara mengerjakan himpunan penyeleisaian dari





2x -4y +30 = 54 dan 3x +2y = 4 adalah

Answer 1

2x-4y+30=54
<->2x-4y = 54-30
<->2x-4y = 24
<->x = (24 + 4y ): 2 ......(i)

3x+2y = 4
<->3((24+4y):2) + 2y = 4
<->((72+12y):2) + 2y = 4
<->36+6y +2y =4
<->36 + 8y =4
<->8y = 4-36
<->y = -32:8
<->y = -4

x = (24 + 4y ): 2
<->x = (24 + 4(-4) ): 2
<->x = (24 - 16): 2
<->x = (8): 2
<->x = 4

jadi x =4 dan y = -4