<PRE><B>Question 262266</B>
If I read your question right, then there are the same number of each type of coin.

Equation: {{{0.05X + 0.10X + 0.25X = 4}}}
Factor out an X on the left side
{{{X*(0.05 + 0.10 + 0.25) = 4}}}
Simplify
{{{X*(0.4) = 4}}}
Divide both sides by 0.4
{{{highlight(X = 10)}}}
The are 10 of each type of coin
10 dimes, 10 nickels, 10 quarters</PRE>