a) x - 2/3 = 1/6

x = 1/6 +2/3

x = 1/6 + 4/6

x = 5/6

b) 2x + 1/2 = -5/3

2x = -5/3 - 1/2

2x = -10/6 - 3/6

2x = -13/6

x = -13/6 : 2

x = -13/6 . 1/2

x = -13/12

c) 3x + 3/2 = x - 5/3

3x - x = -5/3 - 3/2

2x = -10/6 - 9/6

2x = -19/6

x = -19/6 : 2

x = -19/12

a) 11/24 - 5/41 + 13/24+0,5 - 36/41

=( 11/24 +13/24 ) + ( -5/41 - 36/41 ) + 0,5

=1 + (-1) + 0,5

=0,5

b) 1/2 . 3/4 + 1/2 . 1/4 +1/2

=1/2 . ( 3/4 + 1/4 ) +1/2

=1/2 . 1 + 1/2

=1

c) (-3/4)^2 : (-1/4)^2 + 9 . (-1/9) + (-3/2)

=( -3/4 : -1/4 )^2 + (-1) + (-3/2)

=3^2 + (-1) + (-3/2)

=9 + (-1) + (-3/2)

=8 + (-3/2)

=16/2 + (-3/2)

=13/2

d)\(\sqrt{0,25}.\left(-3\right)^3-\sqrt{\frac{1}{81}}:\left(-\frac13\right)^3\)

=0,5 . (-3)^3 - 1/9 . (-3)^3

=(-3)^3 . (1/2 - 1/9)

=(-3)^3 . (9/18 - 2/18)

=-27 . 7/18

=-21/2\(\)

\(\)