Question

A, B and C are collinear points. B is between A and C. AB=12 BC=18 AC=3x Find X.

Answer 1

`x =10`

Explanation:

Given

`AB = 12`

`BC = 18`

`AC = 3x`

Required

Solve for x

Since B is in between both points, then:

`AC = AB + BC`

This gives

`3x = 12 + 18`

`3x = 30`

Divide by 3

`x =10`