6x + 3 = 21
x =3
3x = 24
x = 8
30 - x = 12
x = 18
x + 9 = 23
x = 14
4x = 12
x = 3
x ÷ 7 = 4
x = 28
x ÷ 4 + 2 = 5
x = 12
x + 6 = 18
x = 12
x ÷ 2 = 10
x = 20
4x + 8 = 20
x = 3
2x + 5 = 15
x = 5
a - 4 = 16
a = 20
x - 8 = 15
x = 23
5x = 25
x = 5
7x = 56
x = 8
2x + 7 = 19
x = 6
x ÷ 5 = 3
x = 15
3x - 4 = 14
x= 6
y - 9 = 7
y = 16
8x = 64
x = 8
x - 25 = 10
x = 35
x + 5 = 12
x =7
x ÷ 6 = 9
x = 54
25 + x = 40
x = 15
x ÷ 3 - 1 = 6
x = 21
x + 13 = 20
x = 7
9x - 6 = 30
x= 4
9x = 27
x = 3
5x - 10 = 1
x = 5
x ÷ 2 + 8 = 15
x = 14