Try redo this question on your own incase I may have mistake.. tq
Answer:38 min
Step-by-step explanation:
Given
Cutting time 
Assembly Line time 
to move a batch of rugs from cutting to assembly
Value-added refers to a process or phase in a system that turns raw materials or work in progress into much more desirable goods and services for downstream consumers.
thus value added time is
To simplify this all you need to do is distribute the 4x across each term in the parenthesis