<PRE><B>Question 1150559</B>
&lt;br&gt;
The two equations, as shown by the other tutor, are indeed&lt;br&gt;
F+N = 38
F+4N = 74&lt;br&gt;
But with the two equations in that form, using substitution is the long way around; the two equations are perfectly suited for solving by elimination.&lt;br&gt;
Subtracting the first equation from the second yields&lt;br&gt;
3N = 36&lt;br&gt;
which immediately gives us&lt;br&gt;
N = 12&lt;br&gt;
and then the first equation gives us&lt;br&gt;
F = 26&lt;br&gt;
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