How to help learners realize that 2×+3=5 is not a correct answer​

Step-by-step explanation:

2x+3=5 is not a COMPLETE answer, however it is an answer

Submitting 2x+3=5 instead of doing the work yourself will result in a fail.

Doing work for equations but refusing to the do the final step is absolutely unnaceptable.

I hope that we can improve our learning and answering style soon, as I do not want to repeat myself.

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.