a*(32-3 $\pi$ )/(32-2 $\pi$ )
39 x 0.0025
$$\sum_{a}^{b}{C}$$
F(OA+OB)
x - 2y + 3z = 9
4x + y - z = 2
-3x + 2y + 2z = -1
144 divided by 8
3x + 2y - z = 5
2x - y + 4z = -6
x + 3y + 2z = -3
35% of the pupils in a class wear glasses. 14 pupils wear glasses. How many pupils were there in the class
3x + 2y - z = 7
2x - y + 4z = 10
x + 3y + 2z = 5
=100*110/100*90/100
