Answer:
2.3
Step-by-step explanation:
The numbers are 12, 21.
x+(x+9)=33
x+x+9=33
2x+9=33
2x=33-9
2x=24
x=24/2
x=12
--------
x+9=12+9=21
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Yes it is parellell
C. 5 units is the answer and I am typing to make in 20 characters long.