Question

2) If 3x + 5y = 9 and 5x + 3y = 7, then what is the value of ty?
a) 2
b) 16
c) 9
d) 7
The education cess is​

Answer 1

Answer:

X = 1/2 and Y = 3/2

Step-by-step explanation:

a) 3x + 5y = 9

b) 5x + 3y = 7

=> 15x + 25y = 45  -------- > [ multiplied a) by 5 ]

=> 15x + 9y = 21   ----------> [ multiplied b) by 3 ]

by subtracting b) from a)

we get,

=> 0 + 16y = 24

=> y = 24/16 = 3/2

Now, by substituting y in a)

3x + 5 ( 3/2 ) = 9

x = (9 - 15/2) / 2

x = 1.5 / 3 = 1/2

Not sure what "value of ty" is