One-Step equations
a + 3 = 8
5
a - 5 = 4
9
Variable
any letter that represents a number
5a = 25
5
a/9 = 9
81
x + 8 = 12
4
a - 10 = 13
23
Inverse operation
The opposite, operations that undo each other
25n = 625
25
a/7 = 4
28
a + 21 = 66
45
a - 56 = 8
64
Solution
Any value for the variable that makes the equation true.
18g = 486
27
a/10 = 4
40
a + 30 = 120
90
a - 15 = 15
30
Coefficient
The number that is multiplied by the variable.
12y = 144
12
a/12 = 4
48
a + 12 = 86
74
a - 48= 28
76
Algorithm
A mathematical process or procedure
8x = 56
7
b/12 = 7
84