Question

if 22x+14y =91 and 14x+21y = 47 then x+y is​

Answer 1

Answer:

22x + 14 y = 91. (a)

14x + 21y = 47. (b)

multiply eq a with 14 and eq b with 22.

Than the values of x will be same in both eq

Substract eq b from ex a

the values of x will be cancelled out

and we can calculate values of x and y

Answer 2

Step-by-step explanation:

22x+14y =91 -> (i)

14x +21y =47 -> (ii)

Add (i) and (ii)

22x+14x+14y+21y = 91+47

36x+35y = 138

x = 138/36 - 35y

x = 23/6 - 35y

y = 138/35 - 36x