Question 53464
x=(3/4)x+2/3(1/4)x+25 or x=(3/4)x+(2/12)x+25 or x=(11/12)x+25 or 

x-(11/12)x=25 or (1/12)x=25 or x=25*12 or x=300 pears were on the tree when they started picking.

proof Mike picked 3/4*300=225 which left 300-225=75 left for Sylvia.

Sylvia picked 2/3*75=50 which left 75-50=25 apples unpicked.