Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
 Anna ana mara tatu ya vitu vya kuchezea kama Mandy na vitu viwili chini ya Amanda. Ikiwa wana jumla ya vitu 142, Mandy ana vitu vingapi?


### Response:
 Hebu x iwe idadi ya vitu vya kuchezea vya Mandy.
Anna ana vitu 3*x.
Amanda ana vitu 3*x+2.
x+3*x+3*x+2=142
7*x+2=142
7*x=140
x=<<20=20>>20