# Pair Of Linear Equations In Two Variables

#### Question 1:

Solve the following pair of linear equations by the substitution method.

#### Answer:

(i)* x*
+ *y* = 14 (1)

*x* − *y* = 4 (2)

From (1), we obtain

*x* = 14 − *y* (3)

Substituting this value in equation (2), we obtain

Substituting this in equation (3), we obtain

(ii)** **

From (1), we obtain

Substituting this value in equation (2), we obtain

Substituting in equation (3), we obtain

*s* = 9

*s*
= 9, *t* = 6

(iii)3*x*
− *y* = 3 (1)

9*x* − 3*y* = 9 (…

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