Question 1194373
{{{system(5n+10d=830,5(n+18)+10*2*d=1450)}}}
Simplify and solve the system.


{{{system(n+2d=166,n+18+4d=290)}}}



Question was, "how many dimes?"


{{{system(n=166-2d,4d=290-18-n)}}}


{{{4d=290-18-166+2d}}}

{{{2d=290-18-166}}}

{{{2d=106}}}

{{{highlight(d=53)}}}