Question

we must added to
3x+y to get 2x+3y?​

Answer 1

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Let the number be a

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

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

a = -x + 2y

Hence -x + 2y should be added to 3x + y to get 2x + 3y.

Answer 2

Solution⤵

Let the number be a

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

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

a = -x + 2y

Hence -x + 2y should be added to 3x + y to get 2x + 3y.