Odpowiedzi

2010-03-02T23:12:38+01:00
A)
13/4 = 2(x+2) +3 (x + ¼)
2x + 3x = -3¼ + 4 + ¾
5x = 1½ | : 5
x = 3/10

b)
4x +7 -5x -1 = x +5
4x - 5x -x = -7 +1 +5
-2x = -1 | : (-2)
x = ½

2.
c)
x+5 -2x +1 = ½ (2-x)
x - 2x + ½x = -5 -1 +1
-½x = -5 | : (-½)
x = 10

Malgox;/ 13/4 to nie 1¾