Question

If b is between a and c, and AB=3x-3 and BC=4x+8, and AC=75, find the value of X and AB

Answer 1

Since b is between a and c, then;

AB + BC = AC

substituting into the above;

3x - 3 + 4x+8 = 75

collect like term

3x + 4x = 75 +3 - 8

7x =70

Divide both-side of the equation by 7

x = 10