Odpowiedzi

2010-02-11T16:23:22+01:00
2x + 5 = 7x
-5x+ 2 = -3x
2x-1 + 3x
4-z = 3
7-x = 6
2010-02-11T16:25:01+01:00
A)2x+5 = -5/2
x = -5/2 = -2 ½
b)-5y+2 = -2/(-5)
y = ⅖
c) 2x-1= 1/2
x = ½
d) 4-z
z = 4
e) 7-X
- x = -7/(-1)
x = 7