Question

How do you find x if a line passes through points (x, 7) and (3, 2) and the slope of the line is 1/2?

Answer 1

Set `\frac{rise}{run}=\frac{7-2}{x-3}=\frac{5}{x-3}` equal to the slope `1/2`. Then "cross multiply" to get `10=x-3`. Finally, and 3 to both sides to get `x=13`.