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

**(i) ** **(1)**

** ** ** (2)**

from equation **(2)**

Putting this in equation **(1)**, we get

Putting value of y in equation **(1)**, we get

Therefore, and

**(ii) ** ** (1)**

** (2)**

Using equation **(1)**, we can say that

Putting this in equation **(2)**, we get

Putting value of t in equation **(1)**, we get

Therefore, and

**(iii) ** **(1)**

**(2)**

Comparing equation with and equation with , we get

and

and

We have

**Therefore, we have infinite many solutions for x and y (y=3x-3)**

**(iv) ** **(1)**

** (2)**

Using equation **(1)**, we can say that

Putting this in equation **(2)**, we get

Putting value of y in **(1)**, we get

Therefore, and

** (v) ** ** (1)**

** (2)**

Using equation** (1)**, we can say that

Putting this in equation **(2)** , we get

Putting value of y in **(1)**, we get .

Therefore, and

**(vi) ** **(1)**

**(2)**

Using equation **(2)**, we can say that

Putting this in equation **(1)**, we get

Putting value of **y** in equation **(2), **we get

Therefore, and