posted by Leann .
A small, medium, and large sized chicken were weighing themselves on a scale. The large and medium chicken steppedon the scale together with a total weight of 30 lbs. The large and small chicken had a total weight of 25 lbs. The small and medium chickens had a total weight of 13 lbs. What will the scale read when all three step on together? How much does each chicken weigh? Explain how you found your answer.
These are big chickens. Why didn't they weigh one at a time? I know, they were chicken.
subtract the second equation from the first:
now add the third equation
you take it from there