Odpowiedzi

2010-03-24T17:56:09+01:00
4(1-x) - (1-3x) = 3
4 - 4x - 1-3x = 3
-4x - 3x = 3 - 4 + 1
-7x = -6 I:(-7)
x = 6/7

-(-¼a+1)+3a/2=9
1/4a + 1 + 3a/2 = 9
1/4a + 1 1/2a = 9 - 1
1/4a + 6/4a = 8
7/4a = 8 I*4
7a = 32 I:7
a = 4 4/7
2010-03-24T17:58:59+01:00
4(1-x)-(1-3x)=3
4-4x-1+3x=3
-x+3=3
-x=0
x=0


-(-¼a+1)+3a/2=9
¼a-a+3a/2=9 /*2
½a-2a+3a=9
1½a=9
1½a-9=0