Question

Find out the solution from the values given in the bracket next to following. Show that the other values do not satisfy the equation.
$n+12=20$ $(12,8,20,0)$

Answer 1

$n+12=20\Rightarrow n=20-12\Rightarrow n=8$

(a) $n=12$

L.H.S=12+12=24

R.H.S=20

$L.H.S\ne R.H.S$

(b) $n=20$

L.H.S=20+12=32

R.H.S=20

$L.H.S\ne R.H.S$

(c) $n=0$

L.H.S=0+12=12

R.H.S=20

$L.H.S\ne R.H.S$
Therefore, all three given values does not satisfies the given equation.