Question 221039
if X is their combined time, then the FRACTION that the farmer plows is X/4
___ and the FRACTION that the hired hand plows is X/6
___ the FRACTIONS add to 1 (the WHOLE field)


X/4 + X/6 = 1


multiplying by 12 (LCD) ___ 3X + 2X = 12 ___ 5X = 12 ___ X = 12/5 = 2.4 days