Fundamental Mathematics/Matrix/System of linear equations

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System of linear equations[edit | edit source]

System of linear equation of 2 variables has general form

Which can be written as matrix

To solve for y value[edit | edit source]

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

Subtract 2 equation above

To solve for x value[edit | edit source]

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

Subtract 2 equation above