Finding the Variables:Ryan Kramer

Addition

100

8+a=37

29

8-8=0 and 37-8=29

200

a-37=2

39

37+-37=0 and 2+37=39

300

30-a=17

13

400

a-(-5)=30

25

-5-(-5)=0 and 30 +-5=25

500

a-93=131

224

93+-93 and 131+93=224

Subtraction

100

a-8=37

45

8+-8=0 and 37+8=45

200

-40+a=36

76

-40+40=0 and 36+40=76 

300

a+-5=8

13

-5- (-5)=0 and 8-(-5)=13

400

a+37=81

44

37-37 =0 and 81-37=44

500

a+40=-80

-120

40-40=0 and -80 - 40=-120

Multiplication

100

a/6=20

120

6*-6=0 and 20*6=120

200

a/9=30

270

9*-9=0 and 30*9= 270

300

3/30(3+a)= 10

-2

10*3/30=1 and 1-3=-2

400

5/10(a+8)=56

20

56*5/10=28 and 28 - 8=20

500

3/4(78+a)=98

-4 1/2

98 *3/4= 73 1/2 and 73 1/2 - 78=  -4 1/2

Division

100

5*a=30

6

5/5=1 and 30/5=6

200

a30=90

3

30/30=1 and 90/30=3

300

5(5+a)=30

1

30/5=6 AND 6-5=1

400

13/37a=87

247 8/13

87/13/37=247 8/13

500

5(34+a)=71

-19.8

71/5=14.2 and 14.2 - 34= -19.8

inequalities

100

1a is greater than 6

7 or higher

200

70a is less than or equal to 50

0.71

300

a+4 is greater than or equal to 30

26 or higher

4-4=0 and 30-4=26

400

a-37=93

130

37+-37=0 and 93+37= 130

500

a/27 is less than or equal to 60

60*27=1620 or lower