Question 1051059
{{{(S+97)/n=90}}}
{{{S+97=90n}}}
1.{{{S=90n-97}}}
and
{{{(S+73)/n=87}}}
{{{S+73=87n}}}
2.{{{S=87n-73}}}
Equate 1 and 2 and solve for n.
{{{90n-97=87n-73}}}
{{{3n=97-73}}}
{{{3n=24}}}
{{{n=8}}}