Odpowiedzi

2010-03-17T15:21:55+01:00
A) 12y-(y+5)=10y-1
12y-y-5=10y-1
11y-10y=-1+5
y=4

B)2x-¹₂(3x-2)=⁷₄-x
2x-1,5x+1=7/4-x
0,5x+x=1,75-1
1,5x=0,75 ||:1,5
x=0,5
2010-03-17T15:22:31+01:00
A)12y-(y+5)=10y-1
11y+5=10y-1
11y-10y=5+1
y=6
2010-03-17T15:29:20+01:00
A) 12y-(y+5)=10y-1
12y-y-5 =10y-1
11y-10y =5-1
y =4

B)2x-¹₂(3x-2)=⁷₄-x
2x-³₂x +1 =⁷₄ - x
-½x +1 =⁷₄-x
-½x + x =⁷₄-1
x =⁶₄ =1½