Question

Find the values of x + y if
i) 7x + 5y = 24; 5x + 7y = 36​

Answer 1

7x+5y=24----(1)

5x+7y=36----(2)

Now, multiply eq.(1) by 5 and eq.(2) by 7

Then the equation form,

35x+25y=120

35x+49y=252

- - -

_______________

- 24y = - 132

y=132/24

Putting the value of y=132/24 in eq (1)

Hence, x= -1/2

Hope it helps you