Adding
x = 5
72 - y = 70
y = 2
8n = 24
n = 3
70/n = 10
n=7
Equation
An equation says that two things are equal. It will have an equal sign
9 + y = 27
y = 18
n - 40 = 40
n = 80
9b = 81
b = 9
100/ t = 25
t= 4
Variable
A variable is a place holder for an unknown number.
x + 10 = 75
y = 65
90 - h = 45
h = 45
40k = 120
n/2 = 25
n = 50
Coefficient
A coefficient is a number used to multiply a variable.
18 + x = 22
x = 4
y - 125 = 50
y = 175
10n = 100
n = 10
r/30 = 2
r=60
Constant
A number on its own with no variable attached