Question

vii) If 3x + 5 y = 9 and 5x + 3y = 7 then find the value of x + y.​

Answer 1

Answer:

16

Step-by-step explanation:

3x+5y=9-----(1)

5x+3y=7-----(2)

multiplying eq(1) by 5 & eq(2) by 3 we get

15x+25y=45

-15x ± 9y= - 21

_____________

16y=24

y=

16

Answer 2

Answer:

3x + 5y = 9 ... equation 1

5x + 3y = 7 ... equation 2

Adding Both Equation 1 and Equation 2 We Get,

3x + 5y = 9

5x + 3y = 7

8x + 8y = 16

x + y = 2 ( dividing Both Sides By 8 )

Hope It Helps