Satypal walks 23km from a place P towards east and then there 157km towards west Where will he be now from P ?
Let us denote the distance travelled towards east by positive sign so thus distance of Satypal from the point P would be
23+ (−157) =23+ −127
=2×73×7+ (−12)×37×3
=14−3621 =−2221
=−1121
Since it is negative it means Satypal is at a distance 1121km towards west of P