Question

-7mn+5,12mn+2,9mn-8,-2mn-3
add​

Answer 1

Step-by-step explanation:

-7mn+5+12mn+2+9mn-8+(-2mn)-3

-7mn+5+12mn+2+9mn-8-2mn-3

-7mn+12mn+9mn-2mn+5+2-8-3

=12mn-4

Answer 2

-7mn+5,12mn+2,9mn-8,-2mn-3

Answer

-7mn+5+12mn+2+9mn-8+(-2mn)-3

-7mn+12mn+9mn-2mn+5+2-8-3

5mn+9mn-2mn+7-8-3

14mn-2mn-1-3

12mn-4