Answer :
AB = 4 x - 9
BC = 3 x + 5
AC = 7
B is in between A and C. So AB + BC = AC
4x - 9 + 3 x + 5 = 7
7 x - 4 = 7 take -4 from LHS to the R H S (right hand side) it becomes +4
7 x = 7 + 4 = 11
x = 11/7 = 1.571
BC = 3 x + 5
AC = 7
B is in between A and C. So AB + BC = AC
4x - 9 + 3 x + 5 = 7
7 x - 4 = 7 take -4 from LHS to the R H S (right hand side) it becomes +4
7 x = 7 + 4 = 11
x = 11/7 = 1.571
