Question 883309
1.{{{Q+N=60}}}
2.{{{25Q+5N=740}}}
Multiply eq. 1 by 5 and subtract from eq. 2,
{{{25Q+5N-5Q-5N=740-300}}}
{{{20Q=440}}}
{{{Q=22}}}
Then,
{{{N=60-22=38}}}