Fundamental Mathematics/Matrix/System of linear equations

System of linear equationsEdit

System of linear equation of 2 variables has general form

 
 

Which can be written as matrix

 
 

To solve for y valueEdit

Divide 1st equation by A11 and 2nd equation by A21

 
 

Subtract 2 equation above

 
 
 
 
 
 
 

To solve for x valueEdit

Divide 1st equation by A12 and 2nd equation by A22

 
 

Subtract 2 equation above