Pre-Algebra 1-2 Step Equations

Inverse Basics

100

What is the inverse operation for x - 14 = 20?

Addition (Add 14)

200

What is the inverse operation for 5x = 40?

Division (Divide by 5)

300

What is the first inverse operation you must use for 3z - 1 = 14?

Addition (Add 1)

400

What is the first inverse operation you must use for a/2 + 10 = 15?

Subtraction (Subtract 10)

500

State the two inverse operations (in order) needed to solve 4b - 1 = 19.

Addition(1), then Division(4)

One step solves

100

Solve for x: 

x + 9 = 25

x=16

200

Solve for y: 

y - 6 = 18

y=24

300

Solve for z: 

z+3=10

z=7

400

Solve for a: 

a-30=12

a=42

500

Solve for b: 

b+ 5 =15

b=10

Two Step solves

100

Solve for x: 

2x + 1 = 11  

x=5

200

Solve for y: 

5y - 7 = 8

y=3

300

Solve for z:

 z/3 + 5 = 9 

z=12

400

Solve for a:

2a+6=10

a=2

500

Solve for b: 

-3b + 4 = 16

b=-4

Order and Balance

100

What is the first thing you undo in the equation 

4x - 5 = 15?

Add 5?

200

True or False: To solve y/2 + 3 = 7, you divide by 2 first.

False (You subtract 3 first)

300

Why must you add 4 to both sides of the equation 

w - 4 = 10?

To keep the equation balanced

400

What is the number you would subtract from both sides in 15 = 5x + 10?

10

500

Finish the rule: "Whatever you do to one side of the equation, you must..."

...do to the other side"

One step solves AGAIN

100

Solve for y: 2y = 18

y=9

200

Solve for z: 

z/3 = 12

z=36

300

Solve for a: 

7a = 49

a=7

400

Solve for b: 

b/5 = 4

b=20

500

Solve for c: 

-4c = 24

c=-6