Respuesta :
Answer:
m=21
Step-by-step explanation:
m-13=8
solve for m
we have to get m by itself
we have to move the 13 over to the eight
remember when you move something to the opposite side of the equal sign the sign changes.In this case the -13 will change to a positive 13
m=13+8
13+8
=21
m=21
pls mark me brainliest