Ex - 4.1
Question 1.

Solution


Question 2.

Solution


Concept Insight: Read the question carefully and choose the variable to represent what needs to found. Only one variable must be there in the final equation.
Question 1.
Solution
Question 2.
Solution
Concept Insight: Read the question carefully and choose the variable to represent what needs to found. Only one variable must be there in the final equation.
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