Topic 1 Test Review

Writing Equations

100

Two more than a number is seven

x+2=7

200

Five less than a number is eight

x-5 = 8

300

The product of four and a number is sixteen

4x=16

400

The sum of nine and a number is fifteen

9+x=15

500

Eight less than a number is twelve

x-8=12

One step equations

100

5x=30

x=6

200

x+6=11

x=5

300

x-5=2

x=7

400

x/9 = 2

x=18

500

12x=72

x=6

Two step equations

100

2x+8=16

x=4

200

3x-1=17

x=6

300

x/2 + 4 = 10

x=12

400

x/5 - 6 = 3

x=45

500

4x+7=19

x=3

Combining like terms

100

3x+9x

12x

200

-2y + 15y

13y

300

9x + 3y + 2x + 5y

11x + 8y

400

4a + 9b - 2a + 1

2a + 9b + 1

500

4t + 3b - 6t + 8b

-2t + 11b

Misc.

100

What does "inverse" mean?

Opposite

200

Are 3xy and 5yx like terms?

Yes

300

Name the inverse of each operation:

- Addition

- Multiplication

- Division

- Subtraction

Addition and subtraction are inverses.

Multiplication and division are inverses.

400

What would be the first step to solve this problem?:

2x-9=45

Add 9 to both sides

500

How do you know what to eliminate first in a two step equation?

Remove whichever number is further from x.