Question

Tolong bantu kerjakan nomor 6, terima kasiih

Answer 1

1/x = a, 1/y = b
a + 2b = 3
3a - b = 2

1) a + 2b = 3
a = 3 - 2b
2) 3a - b = 2
b = 3a - 2
3) a = 3 - 2(3a - 2)
a = 3 - 6a + 4
7a = 7
a = 1
4) b = 3(1) - 2
b = 1

*1/x = 1
1 = x
*1/y = 1
1 = y

maka x + y = 1 + 1 = 2