Odpowiedzi

2010-03-15T16:57:08+01:00
A:
5x-2=1
5x=3
x=3/5
x=0,6
b:
5(-2+y)=7(-y+1)
-10+5y=-7y+7
12y=17
y=17/12
c:
1/3(6x-9)+2=3(2/3x+1/3)3
2x-3+2=6x+3
-4x=4
x=-1
d:
-2(x+3)-3(-2x-1)-4=0
-2x-6+6x+3-4=0
4x=7
x=7/4
x=1,75
2 3 2