Question

(D) 27
(CJ 18
(d) 22.5
(ii) If 3x + 5y = 9 and 5x + 3y = 7., when what is the value of
x=y?
(a) 2
(b) 16
(c) 9
(d 7​

Answer 1

Explanation:

3x + 5y = 9

X = 9-5y/3.... Eq. 1

Put equation 1 in other polynomial

5(9-5y/3) + 3y = 7

45 - 25y / 3 + 3y = 7

45 - 25y + 9y / 3 = 7

-16y = 21 - 45

16y = 24

Y = 24/16

Y = 3/2