Question 1046549
{{{system(0.05n+0.1d+0.25q=6.7,d-n=3,q-n=8)}}}


Multiply the money count equation by 20.
{{{system(n+2d+5q=134,d-n=3,q-n=8)}}}


Find two convenient substitutions to do, and first solve for n using the money count equation.