If john ate 1/2 on Friday, then there was a full half of pizza left when he finished. And if he ate 1/3 of what was left on Saturday, there was only 2/3 of the pizza left for him to eat. So he ate 2/3 of a pizza on Sunday
2c+3d=900 C=x D=350-x 2x+3 (350-x)=900 Solve for x to get number of children attended the fair that day 2x+1050-3x=900 2x-3x=900-1050 -1 x=-150 x=150 children
