Answer:
Step-by-step explanation:
A variable is a letter that is used to represent a constant. n could be 56 or 84, both of which are terms and constants. A constant is simply a term that doesn't change.
variable, constant, and term
x = -2.9
y = 2.6
x+y = -2.9+2.6
= -0.3
m - 7 = -13 + m
refer to the image given below: