Question

what should be added to 2a - b +c to make it a + b - 2c?​

Answer 1

Answer:

Let it be =x

2a-b+c. +x. =a+ b-2c

x = a+b-2c-(2a-b+c)

x= a+b-2c-2a+b-c

x=-a+2b-3c

therefore 2b-3c-awill be added

Step-by-step explanation:

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Answer 2

Given:

An expression= 2a-b+c

To find:

An expression that can be added to 2a-b+c to make it a+b-2c

Solution:

We can find the solution by following the given steps-

We know that to get the resultant expression, we need to add or subtract variables from the given equation.

In the resultant equation, there are 1a, 1b, and 2c.

To get that, we need to subtract 1a, add 2b to make it positive, and subtract 3c to change the sign.

So, it becomes 2a-b+c-a+2b-3c

=a+b-2c

Therefore, we need to add the expression -a+2b-3c to make it a+b-2c.