Algebra I

Equations

100

3x + 9 = 30

x = 7

200

4(2x-5) = 60

x = 10

300

x/3 + 5 = 4(5)

x = 45

400

5x + 10 = 2 (x-10)

x = -10

500

Solve for Y.

3(y-6)-18 = 6(x+2) + 24

y = 2x + 24

Negatives

100

-2 - 5 =

-7

200

 - 12 + 6 =

-6

300

-12 / 3 =

-4

400

(-8) · (-2)

16

500

-3(5 - 2)

-9

Vocabulary

100

the name for the unknown number that is represented with a letter

variable

200

the name for a number whose value will always remain the same (no variable)

constant

300

the number in front of a variable in a variable term

EX: 5x (what is the 5 called?)

co-efficient

400

Numbers, symbols and operations (such as + and ·) grouped together that represent the value of something

expression

500

A mathematical expression that shows the value of the expression using an equal sign

equation

Simplify

100

3+(9-1)

11

200

3+2·2-6

1

300

2(3-1)+4

8

400

5·2-3(3-2)-10

-3

500

2(x-4) + 3y - 10 -3(y-2)

2x-12

Variable Operations

100

2x + 5x 

7x 

200

2x - 5x - 4y + 2y

-3x - 2y

300

2x · 5 + 2 · 3y

10x + 6y

400

5(x + 5) - 3(z -4)

5x + 37 - 3z 

500

15 + 3(2x - 6) - 2(y+3) - 10

6x - 2y -19