Zadanie 1
a)(k+1)/3 = m |*3
k + 1 = 3m
k = 3m -1
b) r + st = 1
st = 1 - r |:s
t = (1-r)/s
c) a(c+d) = p|:a
c+d = p/a
d = p/a - c
Zadanie 2
a) 3(x-2) = 2x -11
3x - 6 = 2x - 11
x = 17
b) x - 1/2(3x+3) = 2 - (1-x)
x - 1,5 x - 1,5 = 2 -1 + x
-1,5x + x - x = 2 - 1 + 1,5
-1,5x = 2,5|:-1,5
x = 1,66 // x = 1 i 2/3
