Question 180466
Trinidadhas $2.35 in nickels and dimes. if she has 33 coins in all , find the number of nickels and dimes.
:
lets call the number of nickels and dimes, n and d , respectively
:
n+d=33.............eq 1
.05n+.1d=2.35......eq 2
:
rewrite eq 1 to n=33-d and plug that value into eq 2
:
.05(33-d)+.1d=2.35
:
1.65-.5d+.1d=2.35
:
.05d=.7
:
{{{highlight(d=14)}}}number of dimes
:
{{{highlight(n=33-d=33-14=19)}}}number of nickels