Question

What must be subtracted from 2a+b to get 2a-b

Answer 1

Answer:

2b

Step-by-step explanation:

2a-b-2a-b

=-2b

Answer 2

The number that must be subtracted from 2a + b to get 2a - b is 2b.

Solution,

Let us assume the number that we have to find be X.

Mathematically, the problem that is given to us can be represented by-

⇒   2a + b - X = 2a - b.

Let us bring 2a - b from the right-hand side to the left-hand side and its sign would change from 2a - b to -(2a-b).

Similarly, -X can be shifted from the left-hand side to the right-hand side and it sign would change from -X to +X.

Then we would get,

⇒  2a + b - (2a - b) = X

⇒  2a + b - 2a + b = X

⇒  2b = X.

Hence, 2b must be subtracted from 2a+b to get 2a-b.

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