penyesaian dari x/5+y/4 = 12/5 dan x/2-y/3= 1/2 adalah

Diketahui :
- x/5 + y/4 = 12/5
- x/2 - y/3 = ½

Ditanya :
- Nilai x = .....?
- Nilai y = .....?

Penyelesaian :
- Nilai x :
x/5 + y/4 = 12/5
20(x/5 + y/4 = 12/5)
4x + 5y = 48

x/2 - y/3 = ½
6(x/2 - y/3 = ½)
3x - 2y = 3

(4x + 5y = 48) × 2
(3x - 2y = 3) × 5

8x + 10y = 96
15x - 10y = 15
__________ +
23x = 111
x = 111/23
x = 4 19/23

- Nilai y :
3x - 2y = 3
3(111/23) - 2y = 3
333/23 - 2y = 3
- 2y = 3 - 333/23
- 2y = - 264/23
y = 264/23 ÷ 2
y = 132/23
y = 5 17/23

Maaf Kalau Salah