no idea what the Cross Method is, but maybe you can fit these solutions into it.
After giving away 1/4, there were 3/4 left, so
x - x/4 - (1/3)(3x/4) = 120
x - x/4 - x/4 = 120
x/2 = 120
x = 240
Similarly, if Linda started out with $x,
x - x/4 - x/3 - (1/5)(5x/12) = 18.50
x - x/4 - x/3 - x/12 = 18.50
x/3 = 18.50
x = 55.50
Mr Sanderson makes some cookies for a festival day. She gave 1/4 of the cookies to her sister and 1/3 of the remainder to a neighbour. If she had 120 cookies left, how many cookies did she make in the beginning?
Linda spent 1/4 of her money on books, 1/3 on food and 1/5 of the remainder on drinks. If she had 18.50 left over, how much did she have at first?
Can you show the working out with the Cross Method, thanks, it's due tomorrow.
D:
1 answer