122/4=30.5
30x3=91.5
Piece 1= 30.5in.
Piece 2= 91.5in
Answer:
6.2 is the difference
Step-by-step explanation:
and 
use the second expression to calculate the left-hand side of the first equation:

Add 10 to both sides if this equation to get

and divide both sides by 2

this proves that x = 17, give the two initial equations
Answer:
I think the second blank is 5 and the third blank is 2.
Input 1: Output 5
Input 5: Output 2