Question 39948
n = number of nickels
d = number of dimes
COMBINE THE EQUATIONS:
{{{n - d = 27}}}
+
{{{-1n - 2d = -66}}}
=
{{{-3d = -39}}}
{{{d = 13}}}
PLUG IN:
{{{n - d = 27}}}
{{{n - 13 = 27}}}
{{{n = 40}}}