Question

Bgmana persamaan antara
2/x + 1/y = 5
3/x - 2/y = 4
misal 1/x = a || a= 2 → 1/x= 2 → x= ½

Answer 1

Misal 1/x = a dan 1/y = b maka
2a + b = 5 | x 2
3a - 2b = 4 | x 1
-----------------
4a + 2b = 10
3a - 2b = 4
----------------- +
7a = 14
a = 14/7 = 2
substitusi nilai a ke :
2a + b = 5
2(2) + b = 5
4 + b = 5
b = 5 - 4 = 1
karena 1/x = a maka
1/x = 2
x = 1/2 dan
1/y = b
1/y = 1
y = 1
jadi solusinya = (1/2 , 1)