Given 67 ^ x = 27603 ^ y = 81, find the value of 3 / x-4 / y I'm not going to work out the answer with a calculator. Can you tell me the method?

Given 67 ^ x = 27603 ^ y = 81, find the value of 3 / x-4 / y I'm not going to work out the answer with a calculator. Can you tell me the method?

67^x=27,603^y=81
x=log67(27),y=log603(27)
3/x-4/y
=3*log27(67)-4*log81(603)
=3*log3^3(67)-4*log3^4(603)
=log3(67)-log3(603)
=log3(67/603)
=log3(1/9)
=-2