Addition and Subtraction of like terms

 we can only add OR substrate like terms

 


-3x - 4x since both signs are negative we add 3 and 4 then we keep the negative sign ( -3 + -4 = -7 )

= -7x   

3x + 6y - 2x + y

Example:  3x + 6y - 2x + y  Identify the like terms each term take along the sign infront of it 

Meaning: 3x -2x + 6y + y

  •               x + 7y


Try out: 5p -3r + 2p - 4r

              3x² + 2x - 5x² - 2x

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