Question

-7+m=8
m=15
How do I show work for this tho?

Answer 1

-7 + 15 = 8

Move the 7 over to the 8, the negative sign becomes a positive.

15 = 7+8

7+8 = 15

15 = 15

Answer 2

Use substitution method

-7+(15)=8

8=8

Hope this helps. Have a nice day you amazing bean child.