Answer:
-35
Step-by-step explanation:
I don't know what you are talking about but this is my method ;
[tex]-20 + - 15[/tex]
It is best written as;
[tex]-20+(-15)\\\mathrm{Remove\:parentheses}:+\times - = -\\-20-15[/tex]
Note ; the bracet means multiply so + multiplied by -15
[tex]\mathrm{Subtract\:the\:numbers:}\:-20-15\\=-35[/tex]
