Odpowiedzi

2010-03-12T13:55:47+01:00
A) x + 8 = 20
x = 20-8
x = 12

b) y - 16 = 50
y = 50 + 16
y = 66

c) 70 - z = 69
-z = 69 - 70
-z = -1
z = 1

d) 15 + c = 15
c = 15 - 15
c = 0
1 4 1