Odpowiedzi

2010-02-25T16:25:57+01:00
C) 10=4-2x 2x=-6 x=-3
d) -(2x-1)=4 -2x +1=4 x=-1,5
e) 2(x+1)=x 2x+2=x x=-2
h) 3y+18-y=2y+18 18=18 0=0
i) (x-7)-2(3x+5)=3 -5x=17 x=-3,4
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2010-02-25T16:27:42+01:00
C)10=4-2x 6=-2x |:-2 x= -3

d)-(2x-1)=4 -2x+1=4 -2x=3 |;-2 x= -3/2

e)2(x+1)=x 2x+2=x 2= -x x=-2

h)3(y+6)-y=2(y+9) 3y +18 -y = 2y +9 y=9

i)(x-7)-2(3x+5)=3 (x-7) -6x -10=3 x+7-6x-10=3 5x=6 |:5 x = 6/5
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