Odpowiedzi

2010-01-05T18:49:45+01:00
A) 3x=4/9 / *9
27x = 4 / :27
x=4/27

b) 2x=1 1/2
2x = 3/2 / *2
4x = 3 / :4
x = 3/4

c) 1/5x=2 3/4
0,2x = 2,75 / :0,2
x = 13,75

d) 2/3x=2 1/7
2/3x = 15/7 / *3
2x = 45/7 / :2
x = 45/7 * 1/2
x = 45/14