CBSE Class 10-Mathematics: Chapter –3 Pair of Linear Equation in Two Variables Part 1

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Like the Crest of a Peacock So is Mathematics at the Head of All Knowledge

Questions 1:

At a certain time in a deer park, the number of heads and the number of legs of deer and human visitors were counted, and it was found there were heads & 132 legs. Find the number of deer and human visitors in the park.

Answer:

Let the no. of deer’s be

And no. of humans be y

ASQ:

Multiply (1) and (2)

On solving, we get …

Question 2:

Solve for

(a)

Answer:

On solving, we will get….

On solving, we will get…

(b)

Answer:

Form (1)

On solving we will get…

From (2)

On solving we will get…

Substitute this, to get and

(c)

Answer:

We get

Solve this, to get

Similarly, we can solve for

d.

Answer:

On solving, we get …

(e).

Answer:

Let be a and be b

On solving, we get….

From (1)

(f) If

Answer:

On dividing by , we get

(g)

Answer:

And the two equations:

Solve it, to get…

Subtract:

Solve it, to get…

From (1) and (2)

On solving we get ….