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 __?

Question

unklerhaukus · Answer

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

anonymous · Answer

20:10 ?
2:1?

unklerhaukus · Answer

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

anonymous · Answer

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

unklerhaukus · Answer

which is how many coins?

anonymous · Answer

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

unklerhaukus · Answer

very good ,

unklerhaukus · Answer

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

anonymous · Answer

27
thank you so much

unklerhaukus · Answer

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