Question

Tentukan penyelesaian dari sistem persamaan;
a. x/3 + y/2 = 5/6 dan x/2 +y/3 = 2

b. 1/x + 2/y = 11/12 dan 3/x - 6/y =1 1/4

Answer 1

A. x/3 + y/2 = 5/6
    2x + 3y = 5

x/2 + y/3 = 2
3x + 2y = 12

2x + 3y = 5   |dikali 3| 6x + 9y = 15
3x + 2y = 12 |dikali 2| 6x + 4y = 24 _
                                          5y = - 9
                                            y = -9/5 = - 1  4/5
2x + 3y = 5
2x - 27/5 = 5
10x - 27 = 25
10 x = 52
x       = 5  2/10 = 5  1/5

yg b bingung