Question

Find the value of x- y for the following equations: 7x + 2y = 27 and 3x + 2y = 7​

Answer 1

Answer:

5x + 2y = –3; x + 5y = 4 ... Putting the value of y in (IV) we get 3x – 2 = 7 ⇒3x = 7 + 2 = 9 ⇒ 3x = 9 ⇒x = 3

Answer 2

Answer:

9 is the answer

Step-by-step explanation:

Eq(1) = 7x+2y=27

Eq(2) = 3x+2y=7

subtracting 2 from 1

x comes out to be 5

let's equate the x in 7x+2y = 27

7*5 + 2y = 27

therefore, y = -4

x-y =

5 - (-4)

5+4 = 9