Equations Review

Solve by Subtracting

100

a + 3 = 8

5

200

x + 8 = 12

4

300

a + 21= 66

45

400

a + 30 = 120

90

500

a + 12 = 86

74

Solve by Adding

100

a - 5 = 4

9

200

a - 10 = 13

23

300

a - 56 = 8

64

400

a - 15 = 15

30

500

a - 48= 28

76

Check Solutions

100

y=8x  (0,0)

yes

0=0

200

y=3x-2  (1,1)

yes

1=1

300

y=4x+3  (1,5)

no

5=7

400

y=3x-7  (4,5)

yes

5=5

500

y=6x-3  (2,8)

No

8=9

Solve by Dividing

100

5a = 25

5

200

25n = 625

25

300

18g = 486

27

400

12y = 144

12

500

8x = 56

7 

Solve by Multiplying

100

a/9 = 9

81

200

a/7 = 4

28

300

a/10 = 4

40

400

a/12 = 4

48

500

b/12 = 7

84