Odpowiedź :
Hej!
a)
(x + 2)/9 + (x - 1)/3 = 1 / * 9
x + 2 + 3(x - 1) = 9
x + 2 + 3x - 3 = 9
x + 3x = 9 - 2 + 3
4x = 10 / : 4
x = 2,5
b)
(3x - 5) : 2 - (5x - 1) : 10 = 0 / * 10
2(3x - 5) - (5x - 1) = 0
6x - 10 - 5x + 1 = 0
6x - 5x = 10 - 1
x = 9
Pozdrawiam! - Julka