Vocabulary
These are separated by + or -
Term
2x + 6x + 4x
12x
3(x + 5)
3x + 15
2(3x + 5) + 7x
13x + 10
1/4
0.25
A number by itself
Constant
5x + 7x - 4x
8x
7x + 21
3(2x - 7) + 11x -3
17x - 24
61/100
0.61
A letter that represents a number that is not known
Variable
10x + 5 + x + 10
11x + 15
5(5x - 2)
25x - 10
2(4x - 8) -9x + 7
-x - 9
3/8
0.375
A number BEFORE a variable. We like to say that they are married.
Coefficient
-9x + 2x - 7 + 2
-7x - 5
2(8x - 10)
16x - 10
7(x - 3) - 3x + 9
4x - 12
3/4
0.75
Unlike equations, these do not have an equals sign
Expression
4x + 3y + 2 + y - 3x
x + 4y + 2
-7(9x - 10)
-63x + 70
4(4x - 2) + 9 - 2x
14x + 1
4/5
0.8