Question

1/5x + 1/6y = 12 and 1/3x - 3/7x = 8

Answer 1

1/3 x - 3/7 x = 8 ........... eq 1

1/5 x + 1/6 y = 12 .......... eq 2

(7x - 9x)/21 = 8

7x - 9x = 168

-2x = 168

x = -84

put value of x in eq 1

(1/5 × -84) + 1/6 y = 12

(-84/5) + 1/6 y = 12

( -504 + 5y)/30 = 12

5y = 864

y = 172.8