There exists integer x,y,z satisfying 28x+30y+31z=365 then the value of z-2x for some such triplet is?

1 Answer
Jul 25, 2018

In English calendar year (not leapyear) of 365 days there exist one month of 28 days ,4 months of 30 days and 7 months of 31days .

So 28xx1+30xx4+31xx7=365

Comparing with given relation

28x+30y+31z=365

We get x=1,y=4andz=7

Hence z-2x=7-2*2=5