Answer:
BC = 9
Step-by-step explanation:
First, you need to find what x is and then plug it into the equation for BC.
You can do this by setting both equations equal to 26, which is the total length.
9x+8+7x+2=26
16x=16
x=1
Now that we know x is 1, plug it into BC:
BC = 7(1)+2
BC = 7+2
BC = 9
