human
Lorin has 4 black marbles. Jimmy has 22 yellow marbles. Alex had twice as many black marbles as Lorin and one half as many yellow marbles as Jimmy. How many marbles does Alex have?
assistant
How many black marbles does Alex have? ** Alex has 2*4=<<2*4=8>>8 black marbles
How many yellow marbles does Alex have? ** Alex has 22/2=<<22/2=11>>11 yellow marbles
How many marbles does Alex have? ** Alex has 8+11=<<8+11=19>>19 marbles
#### 19