Odpowiedzi

2010-03-28T12:03:00+02:00
1) 8a + 4 = 36

8a=36-4
8a=32
a=32/8=4
a=4

2) 8/9k + 1/3 = 3
8/9k= 3-1/3
8/9k=9/3-1/3
8/9k=8/3
k=(8/3)/(8/9)=72/24=36/12=18/6=9/3=3
k=3

3) 6b - 3 = -9
6b = -9+3
6b= -6
b= -1

4) -3/4 - 1/4l = 2,25
-1/4l=(2+1/4)+3/4
-1/4l=2+1
0,25l=-3
l=-12
6 5 6
2010-03-28T12:04:30+02:00
1) 8a + 4 = 36
8a=32/8
a=4
2) 8/9k + 1/3 = 3
8/9k=2 2/3 /8/9
k=3
3) 6b - 3 = -9
6b=-6 /6
b=-1
4) -3/4 - 1/4l = 2,25
-0,75 - 0,25l=2,25
-0,25l=3 /-0,25
l=-12
1 5 1