MR CURTIS ALGEBRA RIDDLES

Adding

100

n+14=27

13

200

n + 3 +2n = 9

2

300

n + 43 = 123

80

400

z + 12 + 4z + z = 36

4

500

z + 236 = 543

307

Subtracting

100

n - 9 = 34

43

200

n - 3 + n - 10 = 25

19

300

n - 43 = 102

145

400

n - 23 - 13 = 82

46

500

n - 23 = 1182

1205

Multiplication

100

3n = 36

12

200

10n = 1000

100

300

7n - 5 = 37 

6

400

4n + 10 = 26

4

500

4n + 8 + 2n = 44

6