Question

Sum of Wight of dog + rabbit = 20 ;sum of Wight of cat +rabbit = 10; then what will be the sum of Wight of cat +dog+rabbit ?

Answer 1

I think some data is missing in your question
We can't solve three unknowns from two equations
A similar question in addition to your question it is given sum of cat and dog is 24
Its answer is

Let’s call C, D and R the weight of the cat, dog and rabbit respectively. Then, we have the following equations:

• C + R = 10
• D + R = 20
• D + C = 24

The easiest way to solve this problem is to sum up the three equations (2C + 2D + 2R = 54) and divide by 2

So C+D+R=27