Odpowiedź:
3
b) -9+x = 12 l +9
x=21
c) x- 4 = 6 l +4
x= 10
d) x- 21 = -42 l +21
x = -21
e) 5+ x = 3 l -5
x= -2
f) x+ 46= 87 l -46
x= 41
4
a) z = 4/5
b) x = 54
c) y = 6
d) v = 56/2 = 28
5
a) 3z= 8
:3↓ ↓:3
z= 8/3=2 2/3
b) -4u = 24
: (-4)↓ ↓: (-4)
u= -6
c) t/5= 6
•5↓ ↓ •5
t = 30
d) 3/4v = 12
•4/3↓ ↓ •4/3
v= 16
