Really Easy
Easy
Medium
Hard
Impossible
100

2(x + 10)

2x +20

100

4(3 + 2)

20

100

3(s + 5)

S = 6

100

8(2 + 3)-5

35

100

½(16a + 8)-¼(12y - 8)+ 9

20

200

3(x + 2)

3x + 6

200

5(2 + 10)

60

200

5( t + 2)= 30

T = 20

200

7(9 - 6)+8

29

200

3(8x + 9)-5(x - 10)

6

300

5(y + 1)

5y + 5

300

3(4 + 6)

30

300

4(e + 3)= 20

E = 8

300

9(2 + 4)-7

46

300

¾(12s - 4) + ⅜(8l + 24)-7

25

400

2(4 + z)

8 + 2z

400

2(3 + 9)

24

400

6(p + 4)

P = 2

400

6(5 - 9)+10

34

400

2(6m + 7)-6(o - 5)+5

9

500

6( a +3)

6a + 18

500

4(6 + 8)

56

500

7(h + 5)= 56

H = 8

500

5(3 + 8)-7

48

500

⅚(18m + 6)-⅝(24s - 16)

15