2) b - 2 = 7

3) 4 = c - 1

4) 13 = d + 3

5) 4 e + 3 = 51

6) 6 f - 21 = 3

7) 27 = 4 g - 9

8) h + 5 = 2 h + 9

9) 5 i - 3 = 4 i + 8

S ={5}

S = {9}

S = {5}

S = {10}

S = {12}

S = {4}

S = {9}

S = {4}

S = {11}

1) k + 3 = 2 k - 4

2) 1 = 17 m - 16 m

3) 4 n +1 = n + 25

4) 7 p - 5 = 5 p + 1

5) 3 q - 2 = 5 q - 10

6) 8 r - 3 = 6 - r

7) 10 s - 7 = 3 + 8 s

8) 3 - 5 t = 7 t + 3

9) 80 - 5 u = 20 + u - 12

S ={7}

S = {1}

S = {8}

S = {3}

S = {4}

S = {1}

S = {5}

S = {0}

S = {12}