Odpowiedzi

2009-03-30T21:31:33+02:00
A)
2x-6 = 3x+3
2x-3x=3+6
-x = 9
x = -9

spr:
2 * -9 = 3 * -9 + 3
-18 = -21 + 3
-18 = -18

b)
1/3*(y-1) = 5y
(y-1)/3 = 5y | *3
y-1 = 15 y
-1 = 14y
y = -1/14

spr:
1/3*(-1/14 - 1) = 5* -1/14
-1/42 - 1/3 = -5/14
-14/3 - 1/3 = -5/14
-15/3 = -5/14
-5/14 = -5/14

c)
(6z + 8)/2 = 4 |*2
6z + 8 = 8
6z= 0
z = 0

spr:
(6*0 + 8)/2 = 4
0/2+8/2 = 4
4 = 4
1 5 1