Odpowiedzi

Najlepsza Odpowiedź!
2010-03-29T10:02:56+02:00
1. x/3=x+5/2
x/3 - x = 5/2
-2/3x = 5/2 /:(-2/3)
x = 5/2 x (-3/2)
x = -15/4
x = -3 i 3/4

2. 4/x+6=5/7+x
4/x - x = 5/7 - 6
3x = 5/7 - 42/7
3x = -37/7 /: 3
x = -37/7 x 1/3
x = -37/21
x = -1 i 16/21

3. a+3/5=7/5
a = 7/5 - 3/5
a = 4/5

4. x-2/3=2x+7/5
x - 2x = 7/5 + 2/3
-x = 21/15 + 10/15
-x = 31/15 / :(-1)
x = -31/15
x = 31/15
x = 2 i 1/15

5.5/2m+5=2/4m-1
5/2m - 2/4m = -1 -5
10/4m - 2/4m = -6
8/4m = -6
2m = -6/:2
m = -3