Question

Solve :$s-t=3$
$\frac{s}{3}+\frac{t}{2}=6$

Answer 1

$s-t=\mathrm{3..........}\left(i\right)$

$\frac{s}{3}+\frac{t}{2}=6$

$2s+3t=\mathrm{36.........}\left(ii\right)$

Multiply equation $\left(i\right)$ by $3$

$3s-3t=\mathrm{9............}\left(iii\right)$

Add equation $\left(ii\right)$ and $\left(iii\right)$

$5s=45$,

$s=\frac{45}{5}=9$

$t=s-3$

$t=9-3=6$

$\therefore s=9,t=6$