Answer
$x=x_1 + \dfrac{y-y_1}{m}$
Work Step by Step
Divide $m$ on both sides of the equation to obtain:
$\dfrac{y-y_1}{m} = x-x_1$
Add $x_1$ on both sides of the equation to obtain:
$x_1 + \dfrac{y-y_1}{m} = x$
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