x+ 9= 17 /- 9
x= 17-9
x= 8
2a= - 18 / ;2
a= - 9
y-16= 50 / + 16
y = 66
70-z = 69 / - 70
-z= -1 / x( -1)
z= 1
15 + c = 15 / - 15
c= 0
k:7 = 14 / x 7
k= 98
24: u = 6 / x 24
u= 144
-5v = -100 /: -5
v= 25
