Odpowiedzi

2009-04-20T17:53:23+02:00
A x+4x = 21
5x=21
x=4,2

b 2(2x-1) = 3(x-1)
4x-2=3x-3
x=-1

c (3-2x) * 2 = (x+4) * 7
6-4x = 7x +28
-11x = 22
x=-2

d (5x+1)*4 = 6(3x+5)
20x+4 = 18x +30
2x = 26
x=13

e 4-12x=6-6x
-2=6x
x= -1/3

f ?????

h 3x-5 = 48x - 20
15 = 45x
x= 1/3