Question 3: Solve using cross multiplication method.

(i) and

Answer:

The given system of equations may be written as

By Cross multiplication, we get

and

(ii) and

Answer:

The given system of equations may be written as

By Cross multiplication, we get

and

(iii) and

Answer:

The given system of equations may be written as

By Cross multiplication, we get

(iv) and where

Answer:

Let and

The given system of equations may be written as

By Cross multiplication, we get

(v) and

Answer:

The given system of equations is

By Cross multiplication, we get

(vi) and

Answer:

The given system of equations may be written as

By Cross multiplication, we get

(vii) and

Answer:

The given system of equations may be written as

By Cross multiplication, we get

(viii) and

Answer:

We can simplify the equation first:

The given system of equations may be written as

By Cross multiplication, we get

(ix) and

Answer:

First simplify the equation:

The given system of equations may be written as

By Cross multiplication, we get

(x) and

Answer:

First simplify the equations:

Also

By Cross multiplication, we get

(xi) and where

Answer:

Let and

Therefore the given set of equations can be written as:

By Cross multiplication, we get

Therefore