Question

Negative 5.4 + x = 12.2. Minus 5.4. x = 6.8.
What error, if any, did she make?

Answer 1

The answer is correct x =6.8, if she made an error, it might have been the steps she took.

Explanation:

5.4 + x = 12.2

subtract 5.4 from both sides to put x terms on the left hand side, numerical number terms on the right hand side

5.4 - 5.4 + x = 12.2 - 5.4

x = 6.8