Question

Find x if AB = x + 18, BC = 35 + 2x,
and AC = 17.

Answer 1

x = -12

Explanation:

Collinear points mean that points are on the same line. Drawing a sketch of the positions of the points can help you greatly. Form an equation, substitute in the values and solve.

AB + BC = AC

(x+18)+(35+2x)=17

3x + 53 = 17

3x = -36

x = -12