math word problems
posted by lori .
Sally and marta had the same number of postcards. After sally sold 18 of her postcards, marta had 4 times as many postcards as sally. How many postcards did each girl have to begin with?
s = m
(s-18)*4 = m
4s-72 = s
3s = 72
s = 24
they both started with 24
sally sold 18, leaving her with 6. marta then had 4 times that.
a box of chalk and 2 staplers cost ten dollars. three boxes of chalk and two staplers cost eighteen dollars. find the total of one box of chalk and one stappler
They both started off with 24 cards