Question

The coordinates of point $B$ on x-axis are given as $(3m+18,2m-2)$.
Find the coordinates of $B$.

Answer 1

Given:
Coordinates = $(3m+18,2m-2)$ ...(i)
Since, the point $B$ lies on x-axis.
Coordinates of point $B$ = $(x,0)$ ...(ii)

Comparing equation (i) with equation (ii) we get,
$(2m-2)$ = $0$
$2m$ = $2$
$m$ = $1$

Again, substituting the value of $m$ in $(3m+18)$ we get,
$(3m+18)$ = $\left[3\right(1)+18]$
= $(3+18)$
= $21$
Therefore, coordinates of $B$ are $(21,0)$.