Odpowiedzi

2010-04-08T15:49:25+02:00
A) 4t+3=6t /-4t
3=2t /:2
t=3:2
t=1,5

b)4x+12=3x+21 /-3x
x+12=21 /-12
x=9

c)2y+13=5y+4 /-2y
13=3y+4 /-4
9=3y /:3
y=3
2010-04-08T15:52:40+02:00
A)4t + 3 = 6t /-4t
3=2t /:2
t=1.5
b)4x +12 = 3x+21 /-12
4x =3x + 9 /-3x
x=9
c)2y + 13 = 5y+4 /-4
2y+9 =5y /- 2y
9= 3y /:3
y=3