human
40 less than 10 times Diaz's age is 20 more than 10 times Sierra's age. If Sierra is currently 30 years old, how old will Diaz be 20 years from now?
assistant
How old is Sierra? ** If Sierra is currently 30 years old, 10 times her age is 30*10 = <<30*10=300>>300.
How old will Diaz be 20 years from now? ** Twenty more than 10 times Sierra's age is 300+20 = 320
How old will Diaz be 20 years from now? ** 320 is 40 less than ten times Diaz's age so 10 times Diaz's age is 320+40 = 360
How old is Diaz? ** If ten times Diaz's age is 360, Diaz is 360/10 = <<360/10=36>>36 years old.
How old will Diaz be 20 years from now? ** Twenty years from now, Diaz will be 20+36 = <<20+36=56>>56 years old.
#### 56