Question

what should be added to get 4x+2y to get 2x+1y​

Answer 1

Answer:

2x + y

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Step-by-step explanation:

Answer 2

Answer:

The expression to be added is $2x+1y$

Step-by-step explanation:

We need to find the expression to be added to get $4x+2y$ from $2x+1y$.

It is enough to subtract $2x+1y$ from $4x+2y$. When we do the subtraction, subtract the coefficients of each variable separately.

So,

$4x+2y-(2x+1y)=4x+2y-2x-1y=4x-2x+2y-1y=2x+1y$

Note that, during the calculation, we did the following.

$4x-2x=(4-2)x=2x$

and

$2y-1y=(2-1)y=1y$.