Daughter's present age = x. Daughter's age in 30 years time = x + 30.

Carla's present age is y. Carla's age in 30 years time is y + 30.

Use the above to form equations from the statements below:

"Carla is 4 times older than her daugther":

"in 30 years she [the daughter] will be half her [Carla] age":

Solve the equations for x and y.