Question

Solve the following pair of linear equations by the substitution method.
$s-t=0$
$\frac{s}{3}+\frac{t}{2}=5$

Answer 1

Given, $s-t=0$

or, $s=t$........(1).

And
$\frac{s}{3}+\frac{t}{2}=5$

Using values of (1) we get,

$\frac{5t}{6}=5$

or,$t=6$

$\Rightarrow s=6$.

So, $s=6,t=6$.