In the following figure, the value of x is...

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

[tex]5 \times1 \frac{12}{13} [/tex] me