Why is the answer 12?

Question

https://code.sololearn.com/wcWI3dUBrEF6/?ref=app

Please I don't understand why the answer is 12. Can someone clearly explain ?

Answer 1

Equal has the high priority than + so first $b=$c will assign c value to b .(b = 2)
So now it happens $a+$b => 10+2
So answer is 12
hope it helps..

Answer 2

Yh a little thnks