Algebra 1

Solving for x

100

5x = 25

x = 5

200

4x + 1 = 9

x = 2

300

2x - 3 = 13

x = 8

400

10x + 14 = 74

x = 6

500

-5 - 2x = 9

x = -19

Absolute Value

100

| x + 2 | = 6

x = 4, -8

200

| 2x + 4 | = 8

x = 2, -6

300

|7 - 2x| = 3

x = 2,5 

400

| 12x + 11 | = 83

x = 6, -7.8

500

| -x/4 + 5 | - 2 = 6

x = -12, 52

Proportions

100

x/2 = 6/12

x = 1

200

x/2 = 8/4

x = 4

300

3/8 = 15/x

x = 40

400

2.4/3.6 = x/1.8

x = 1.2

500

5n-2/8 = n+8/3 

n = 10

Distributive Property

100

2(6 + 9) 

30

200

5(x + 13)

5x + 65

300

6 (2x + 8) + 2(4x + 2) 

20x + 52

400

5(6x - 2y) + 3(3x - 4y)

39x - 22y

500

-8(4x + (-5y)) + 7(14x - 3)

66x + 40y - 21

Vocabulary

100

The part of an equation that can be changed is a...

Variable

200

Terms with the same variable are called... 

Like Terms

300

The Property that says a constant or variable is equal to itself is the...

Reflexive Property

400

The property that says that any number plus a negative of itself is the...

Additive Inverse

500

The property that states that if a = b then a + c = b + c is the...

Additive Property of Equality