Question

4x+6/y=15,3x-4/y=7
solve plzz​

Answer 1

Answer:

x = 3 and y = 2

Step-by-step explanation:

let t = 1/y

Now, the equations are :

4x+6t=15 ----(1)

3x-4t=7 -----(2)

let's solve by elimination method.

3 × equation (1) : 12x + 18t = 45

4 × equation (2): 12x - 16t = 28

- + -

---------–----–----------------------------

=> 34t = 17

=> t = 17/34 = 1/2

=> 1/y = 1/2

=> y = 2

putting t in equation (2),

3x-4t=7

=> 3x - 4×1/2= 7

=> 3x -2 = 7

=> 3x = 7+2 = 9

=> x = 9/3 = 3