Question 936899
12 m+ 18 w = 14 days
So ie( 12 m+ 18 w)14 = 1
12 m + 18 w = 1/14---- eqn1
Muliply eqn1 by 2/3 
12×2/3 m + 18×2/3w =1/14×2/3
6m+12w = 21
So 21 days is the answer