Odpowiedź:
a) 3x+5x-3x = 5x
b) -2y-5y+2y = 5y
c) z+z+z-z-z = z
d)
[tex]\frac{1}{2} m-0,5m+\frac{1}{8} m-0,25m\\ = \frac{1}{2} m - \frac{1}{2} m +\frac{1}{8} m- \frac{1}{4} m=\frac{1}{8} m- \frac{2}{8} m = -\frac{1}{8} m[/tex]
e) [tex]5b - \frac{1}{5} b-\frac{4}{5} b+b =5b- \frac{1}{5} b-\frac{4}{5} b +\frac{5}{5} b = 5b[/tex]
f) -a +a+a-a= 0
