# Pair Of Linear Equations In Two Variables

#### Question 3:

#### Answer:

(i) Let the first number be *x* and the other number be *y* such that *y* > *x*.

According to the given information,

On substituting the value of *y* from equation (1) into equation (2), we obtain

Substituting this in equation (1), we obtain

*y* = 39

Hence, the numbers are 13 and 39.

(ii) Let the larger angle be *x* and smaller angle be *y*.

We know that the sum of the measures of angles of a supplementary pair is always 180º.

According to the given information,

From (1), we obtain

*x* = 180º − *y* (3)

Substituting this in equation (2), we obtain

Putting...

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