Solve each of the following systems of equations by the method of cross-multiplication:

   

   

   

   

   

   

Solution:

Let substitute :

   

And

   

Equations

   

   

Cross multiplication Method

   

Comparing the two equations

   

   

=

And,

   

Substitute the value of x in equation (i)

 

   

   

   

   

   

Solution:

Let 1/x = u and

   

   

   

   

   

Cross multiplication Method

   

Comparing the two equations

   

   

=

And,

=

,