Question

Add using horizontal method.
(a) 7x +3y and - 4x - 2y​

Answer 1

7x + 3y +( -4x -2y )= 7x -4x +3y -2y = 3x + y

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Answer 2

Answer:

$(7x + 3y) + ( - 4x - 2y) \\ = 7x + 3y - 4x - 2y \\ = (7x - 4x) + (3y - 2y) \\ = 3x + y$

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