Grade 8: Chapter 3 Review

One-Step Equations

100

Find x if...

x - 5 = 0

x = 5

200

Find x if ...

2x = 20

x = 10

300

Find x if...

x/3 = 11

x = 33

400

Find x if ...

x + 12 = 7

x = -5

500

Find x if...

3/4x=6

x = 8

Two-Step Equations

100

Find x if...

2x - 4 = 0

x = 2

200

Find x if...

x/3-7=3

x = 30

300

Find x if...

-4x - 5 = 7

x = -3

400

Find x if...

3(3x - 4) = 6

x = 2

500

Find x if...

20x - 42 = -12

Show your answer as a fraction in lowest terms.

x = 3/2

Substitution

100

Evaluate the expression

x - 5

when x = 10

15

200

Evaluate the expression

2x + 8

when x = 0

x = 8

300

Evaluate the expression

3x - 7 

when x = 50

x = 143

400

Find the value of y of this relation when x=-2

y = 2x + 5

Write your final answer as an ordered pair.

(-2, 1)

500

Find the value of y for this relation when x = 9

y=x/3-5

Give your final answer as an ordered pair

(9, -2)

Intercepts

100

True or false: The x-value at the x-intercept is always zero.

False.

200

Find the y-intercept of the line

y=3x

Give your answer as an ordered pair

(0, 0)

300

Find the y-intercept of the line

y = 2x + 5

Give your answer as an ordered pair

(0, 5)

400

Find the x-intercept of the line

y = 2x - 4

Give your answer as an ordered pair

(2, 0)

500

Find BOTH the x and y-intercepts of the line

y = 3x + 4

Give your answer as ordered pairs

(0, 4)

(-4/3, 0)

Fractions

100

1/5+3/5=

4/5

200

2/3xx4/5=

8/15

300

3/2-:7/8=

12/7

400

4/5+11/7=

83/35

500

True or False: The top of the fraction is called the denominator and the bottom of the fraction is called the numerator.

False