Question

Elena solved the equation 2(x – 9) = 10 In the
following way. What mistake did she make?

Answer 1

She subtracted instead of adding.
2x-18=10
You add 18 to both sides
So it would be 2x=28
Then you divide 2 on both sides so x=14

Answer 2

Answer: Subtract 18 on both sides is wrong. Its supposed to be add 18 on both sides.

Explanation: