Answer:
(simplified form)
Step-by-step explanation:
I is the total length of all the 5 rods.
Each of the 5 parts lengths are
, respectively.
<em>We add all of them and equate it to I:</em>

<em>Simplifying this, we take like terms and add:</em>
<em>
</em>
Part(A):
To solve the system of Linear equations using Substitution:

Consider the first equation, x+y=7 implies x=7-y













PArt(B): Use a graph to verify your answer to the system:
Using Desmos graphing calculator, graph the two equations.
Answer:
(−1,5)
Step-by-step explanation:
hope this helpes