Quote:
*WA@wua8175 writes:*
> *oshin29 sends image:*
Both II and III. Try x,y = 4 and z=2 for II. And Try x,y= 8 and z=4 for III.
Yes... the trick here is to put x =y=2z
Quote:
*WA@wua8175 writes:*
> *GK2722 writes:*
> Is it 10 and 20??
Did you get the answer through substitution or a different method?
Using guess ... 4 is impossible ... only possible combination is 1,1,2
For 10 and 20 ... ...you can see that the numbers can be split in way like 4 + 4 + 2 and 8 + 8 + 2 (2a + 2a + a) format ... I just those numbers in equations ... it worked ... not a suggested method because in exams this kind of guesses may or may not work