Question

Solve the equation $3m-14=4$ by trial and error method.

Answer 1

Substitute the value of $m=3$ in $3m-14=4$
$LHS=3\times 3-14=9-14=-5$
$RHS=4$
On comparing LHS and RHS, we get LHS $\ne$ RHS

Next, substitute the value of $m=4$ in $3m-14=4$
$LHS=3\times 4-14=12-14=-2$
RHS $=4$
On comparing LHS and RHS, we get LHS $\ne$ RHS

Next, substitute the value of $m=5$ in $3m-14=4$
$LHS=3\times 5-14=15-14=1$
RHS $=4$
On comparing LHS and RHS, we get LHS $\ne$ RHS

Next, substitute the value of $m=6$ in $3m-14=4$
$LHS=3\times 6-14=18-14=4$
$RHS=4$
On comparing LHS and RHS, we get LHS = RHS

$\therefore m=6$ is the solution of the given equation.