Expressions and Equations 8th grade

Vocabulary

100

The number in front of a variable in a term

What is a coefficient

200

a math phrase that includes numbers, letters and operations signs but no equal sign

What is an expression

300

A constant or a variable in an expression

What is a term

400

3x and 15 x  or

2y²   and 27y²   or

23 and -12

What are like terms

500

a letter that represents an unknown value

What is a variable

Simplify This

100

2x + 3x + 3

What is 5x + 3

200

4(x+2) - 2x +5

What is 2x + 13

300

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

What is 4x + 6

400

1p + 1p + 2t + 3t+ 1p + t -36 + 32

What is 3p + 6t - 4

500

2x + 2x²  + 3x² + 4x - 16 + 22 -3x² - 5x

What is 1x + 2x² + 6

Solve This

100

3(2a - 6) = 36

What is a= 9

200

-8 + 9m - 4 - 3m = 6

What is m= 3

300

24 - 2(4p + 8) = 56

What is p = -6

400

6x -2(15 - 2x) = 10

x =4

500

-8n + 4(1 + 5n) + 6n = -14

What is n= -1

What's the next step

100

1/3x - 4 = 12

What is add 4 to both side

200

DOUBLE JEOPARDY (double points)

4(x-2) + x -4x =-8

4x-8 + x - 4x = -8

Your correct answer should include the next step AND what the next line should look like

What is combine like terms

4x + 1x -4x  =  5x - 4x  

       so

1x -8 = -8

300

-3x + 4 = -x -12

What is add 3x to both sides.

*Note: This is not the only correct answer, but it is the one we discussed most in class. (-3 is a smaller coefficient that -1)

400

1 - x + 12 + 2x = 4

13 + x = 4

What is subtract 13 from both sides

500

4(x - 2) + 3x = 20

Distribute 4 to x and -2

Variables on Both Sides

100

-2a - 8 = 12 + 8a

What is a = -2

200

-2x + 1 -5x = -5 + 7x

x = 3/7

300

4n - 40 = 7(-2n + 2)

n = 3

400

3( 1 - 3x) = 2(-4x + 7)

x = -11

500

-3(x - 1) + 8(x - 3) = 6x + 7 - 5x

x= 7