Question

Cross multiplication method for 3 variables x y z

Answer 1

Step 1: First of all write the variables which are used in the horizontal line.

x y z

Step 2: Now you will write the coefficients of both equation from both variables. 

x y z

x1 y1 z1

x2 y2 z2

step 3: 

Now, for solving the value of x,y,z write 

x/(y1z2-y2z1)

=-y/(x1z2-x2z1)

=z/(x1y2-x2y1)