Question

Check whether the value of x given is a solution of the given equation or not:

$8x-3=9x+15$, $x=-6$

Answer 1

For $x=-6$,

$$\begin{gathered} L.H.S.=8\times (-6)-3 \\ =-48-3 \\ =-51 \end{gathered}$$

Also,

$$\begin{gathered} R.H.S.=9x+15 \\ =9\times (-6)+15 \\ =-54+15 \\ =-39 \end{gathered}$$

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

Hence, $x=-6$ is not a solution of the given equation.