Question

The ratio of Luis´s salary and Andres´s salary is 5 to 3. In July by mistake, Andres received $720 more, which received the same amount from Luis. How much is Luis´s salary?

Answer 1

Luis Salary is 1800 dollars

Explanation:

Ration of Luis´s salary and Andres´s salary is 5:3

`(L)/(A) = (5)/(3)\\3L -5A = 0` -- Eq (1)

Let Luis salary be X

Then Andrews salary in July would be A + 720 while Luis salary in July is L

L = A + 720 ---E q (2)

Substituting the values in above equation 1, we get -

`3 ( A +720 ) -5A = 0\\2 A = 720 *3\\A = 1080`

Luis Salary is

`A + 720 = 1800`