Respuesta :
Well, i'm assuming m is 40 since 30 + 10 = 40.
As an equation it is:
m - 30 = 10
As an equation it is:
m - 30 = 10
m - 30=10
Difference is used as subtraction so you then identify that the word (is) is used as = so you create the equation around what you know.
