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Adding Equations
Subtracting Equations
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Division Equations
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100

x + 3 = 7

x = 4

100

y - 2 = 4

y = 6

100

3z = 12

z = 4

100

w/2 = 8

w = 16

100

x + 1.5 = 3.0

x = 1.5

200

x + 5 = 12

x = 7

200

y - 7 = 3

y = 10

200

5z = 25

z = 5

200
w/3 = 5

w = 15

200

y - 0.7 = 1.2

y = 1.9

300

x + 9 = 15

x = 6

300

y - 15 = 5

y = 20

300

4z = 28

z = 7
300

w/4 = 9

w = 36

300

0.4x = 0.8

x = 2

400

x + 11 = 20

x = 9

400

y - 22 = 13

y = 35

400

6z = 42

z = 7

400

w/5 = 7

w = 35

400

z/1.5 = 4

z = 6

500

x + 20 = 45

What should we do to get the "x" by itself?

Subtract 20 from both sides.
500

y - 30 = 18

What should we do to get the "y" by itself?

Add 30 to both sides.

500

7z = 56

What should we do to get the "z" by itself?

Divide both sides by 7.

500

w/8 = 6

What should we do to get the "w" by itself?

Multiply both sides by 8.