Answer:
The answer is "A variable represents an unknown quantity"
Explanation:
For example 3b-5=25
To answer this question you would need to find the variable. The variable is b. we know this because tho get 60 you would need to multiply 3 and b and your answer is 25 so that means before you subtract 5 your answer would be 30. meaning b=10 because 10x3=30. b=10