Question

if 8x-7y is equal to 11 and 7x-8 y is equal to 4, then what is the value of x + y?

(A) 1 (B) 15 (C) 7 (D) 4​

Answer 1

Answer:

x=4

y=3

x+y=7

this is right explanation

Answer 2

Step-by-step explanation:

GIVEN,

8x-7y = 11 ...(i)

7x-8y = 4 ...(ii)

WE HAVE TO FIND : THE VALUE OF x AND y

ON SUBSTRACTING (ii) FROM (i)

(8x-7y) - (7x-8y) = 11-4

=> (8x-7x) + (8y-7y) = 7

x+y = 7

HENCE, x+y = 7 ANS.