Odpowiedzi

2010-03-24T17:38:24+01:00
2(¼x+⅓x)= x- 2⅔
½ x + ⅔x -x = -2⅔
³/₆ x+⁴/₆ x- ⁶/₆ x= -2⅔
⁷/₆x- ⁶/₆ x= -2⅔
¹/₆x = -2⅔ / *6
x = -⁸/₃ * 6
x = -16

2(n-6)+ 13= n-3+27
2n-12+13 = n-3+27
2n-n = -3+27+12-13
n=23