Question

what must be added to 3x+y to get 2x+3y​

Answer 1

let the added number be 'a'

therefore, 3x + y + a = 2x + 3y

a = 2x - 3x + 3y - y

a = -x + 2y

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Answer 2

Let the no. to be added = a

(3x + y) + a = (2x + 3y)

a = (2x + 3y) - (3x + y)

a = 2x + 3y - 3x - y

a = 2x - 3x + 3y - y

a = -x + 2y

-x + 2y is to added

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