CBSE Class 10-Mathematics: Chapter – 3 Pair of Linear Equation in Two Variables Part 19 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 16:

If is added to the numerator of a fraction, it reduces to and if is subtracted from the denominator, it reduces to . Find the fraction.

Answer:

Let the fraction be

According to question,

Or

And

Or

On solving eq. (i) and (ii) , we get,

Question 17:

Solve the following system of equation graphically.

, , also read the points from the graph where the lines meet the axis and y-axis.

Answer:

Solve the Following System of Equation Graphically

Solve the Following System of Equation Graphically
Solve the Following System of Equation Graphically

The straight line (i) meet the axis at

And straight line (ii) meet the axis at

Question 18:

Solve and .

Answer:

On adding eq. (i) and (ii)

Or

On subtracting

On adding (ii) and (iv) we get

Question 19:

A man has only paise coins and paisea coins in his purse. If he has coins in all totaling ₹ . How many coins of each kind does he have?

Answer:

Let the number of coin of

paise be ‘x’ and

paise be ‘y’

According to question

And

Or

Number of paise coin

And number of 25 paise coin

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