Answer:
(2x-2) + (x+13)=6x+2 (take the lengths of AB and BC added together, and put equal to the value of AC)
3x+11 =6x+2 (drop the parenthesis and combine like terms on the left side)
-3x +11 =2 (subtract 6x from both sides and then subtract 11 from both sides)
-3x = -9 (divide both sides by -3 to find what x is)
x=3 (take the x value and plug it into the expression to find the length of AC)
6(3)+2 (multiply)
18+2 (add)
20 (this is the length of AC, and what you put in the box)
Step-by-step explanation:
i hope this helps :)
