Two walkers A and B move along the same straight track

MATHEMATICS · Subjective · AoPS · Mathematics · One-Variable Linear Equations · One-Variable Linear Equations

Problem

Two walkers A and B move along the same straight track. Their displacements (in metres) as functions of time (in seconds) are given by

x_A = 2t

x_B = 10 - t

. Determine the time at which the two walkers are at the same position.