Let M be the money that Huimei had at first.
Huimei spent 3/8*M on stationary.
She had (5/8)*M left.
Huimei spent 1/2*(5/8)*M = 5/16*M on a pen.
She had (5/8)*(1/2)*M = 5/16*M left.
Huimei has 2.50 = 5/16*M left.
Therefore, M = 2.50/(5/16) = 2.50*16/5 = 10.00
At first, Huimei had $10. Answer: \boxed{10}.
Huimei spent 3 8 of her money on stationary and 1 2 of the money left on a pen. She has $2.50 left. How much money did she have at first left?
1 answer