Question

A box contains two kinds of coins. $5 and $2. The ratio of the number of $5 coins to the number of $2 coins is 4:5. If the total value of the coins is $90, then the total number of coins in the box is __?

Answer 1

what is the ratio of $ of 5$ coins to $ of 2$ coins

Answer 2

20:10 ?
2:1?

Answer 3

right, so if the total value of all the coins is 90$, how much $ of each type of coin ?

Answer 4

2x+x=90
x=30
30 $2

Answer 5

which is how many coins?

Answer 6

15 coins of $2, 12 coins of $5?

Answer 7

very good ,

Answer 8

... the total number of coins in the box is __?

Answer 9

27
thank you so much

Answer 10

nice work \[\boxed{\huge\color{red}\checkmark}%unk\]