Final answer:
By setting the expressions for PQ and RQ equal since R is the midpoint and solving for x, we found out the length of bar (RQ) to be 36 units.
Step-by-step explanation:
To find the length of bar (RQ), we need to understand that because R bisects PQ, the lengths of PR and RQ are equal. Given the equations for PQ and RQ, we set them equal to each other because R is the midpoint:
PQ = 2 * RQ
8x + 24 = 2 * (8x - 12)
We then proceed to solve for x:
8x + 24 = 16x - 24
Adding 24 to both sides gives us:
8x + 48 = 16x
Now, we subtract 8x from both sides to get x by itself:
48 = 8x
This gives us:
x = 6
Now that we have x, we can find the length of RQ by plugging x back into the RQ equation:
RQ = 8x - 12
RQ = 8*6 - 12
RQ = 48 - 12
RQ = 36
Hence, the length of bar (RQ) is 36 units.