Question

4x+7y=10,20x-35y=35 find the value of x and y ​

Answer 1

Answer:

4x + 7y = 20 -----(!) *5

20x + 35y = 100 ----(!!)

20x-35y= 35 -----(!!!)

★ After Solving (!!) and (!!!)

40x = 135

x = 27/8

Putting x = 27/8 in (!)

We Get,

4*27/8 + 7y = 20

27/2 + 7y = 20

27 + 14y = 40

14y = 13

y = 13/14