Kaitlin solved the equation for x using the following calculations.

Answer a  because you do the opposite so adding would be the correct way

Option 1

Step-by-step explanation:

Given is an equation in one variable x.

It is as follows:

-5.4+x=12.2

To solve for x, we must make left side only with x and eliminate -5.4

For this only way is to add 5.4 to both the sides of the equation without affecting the equality.

When we add 5.4 to both sides -5.4 gets cancelled with 5.4 and make left side only x

-5.4+x=12.2

+5.4       5.4

x         =17.6

Thus we get answer correctly as 17.6

Kaitlin instead subtracted 5.4 from both the sides which made the equation

as

-10.8+x=6.8

Thus her answer 6.8 is incorrect

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