3.

4.

5. A's age 10 years hence will be 4 times what B's age was 11 years ago, and the amount that A's age exceeds B's age is one third of the sum of their ages 8 years ago. Find their present ages.

6. Draw the lines represented by the equations

and

6. and find by algebra the coÖrdinates of the point where they intersect.

7. Solve the equations

8. Solve