Question 245928
Anne's age is seven tenths of Bill's age. In 4 yrs Anne's age will be eight eleventh's of Bill's age. How old is Bill now?

Let A be Annie's age and B be Bill's age. Four years from now their ages will be A+4 and B+4, respectively.

We know from the first statement above that:

A = .7B

From the second sentence we also know that:

A+4 = (8/11)*(B+4)

Substitue .7B for A in the equation above:

.7B = (8/11)* (B+4)

Solve for B above and then use that value for B in A=.7B to get the value for A.