Question

(-10) + (-10) = 10 –
PLS HELPPPP

Answer 1

Remove parantheses:
-10 + -10 = 10

Simplify:
-10 - 10 = 10

Simplify:
-20 = 10

It's false so there is no solution

Answer 2

Explanation:

-10 + -10 = -20

so

10 - _ = -20

10 - 30 = -20