Intro to C# on Module 2 Quiz on Shorthand

Question

There was a question that I thought I knew how to answer:
Write the shorthand for the second line for the given C# code...

int points = 50;
points = points + 10;

I thought the answer was: points += 10;
Then I tried: points =+ 10;

What is it? If you answered points += 10; Solorlearn said it's incorrect (https://s.mythoslife.com/eDur5N0J).

Answer 1

Your first guess was right, points += 10;

Answer 2

According to Sololearn that's incorrect? See https://s.mythoslife.com/eDur5N0J

Answer 3

Contact SoloLearn [e-mail]
Explain what happened and include the screenshot. They will see through it.