Question

If B is between A and C, and AB=3x+1 and BC=2x-7, and AC=19, find the length of AB.

Answer 1

16

Explanation:

AB+BC=AC

3x+1+2x-7=19

5x-6=19

5x=25

x=5

AB=3x+1

AB=3(5)+1

AB=15+1

AB=16