Odpowiedź:
d)
x/6 - 1/6 = 1 | * 6
x - 1 = 6
x = 6 + 1 = 7
e)
- 2(2x - 1) = x/3 | * 3
- 6(2x - 1) = x
- 12x + 6 = x
- 12x - x = - 6
- 13x = - 6
13x = 6
x = 6/13
f)
2/5(3 - x) = - 2 | * 5
2(3 - x) = - 10
6 - 2x = - 10
- 2x = - 10 - 6 = - 16
2x = 16
x = 16/2 = 8
g)
3/4(2 - 3x) = - 6 | * 4
3(2 - 3x) = - 24
6 - 9x = - 24
- 9x = - 24 - 6
- 9x = - 30
9x = 30
x = 30/9 = 10/3 = 3 1/3
h)
1/5(x - 3) = 9 - x | * 5
x - 3 = 45 - 5x
x + 5x = 45 + 3
6x = 48
x = 48/6 = 8
i)
(0,6 + x)/2 = x + 1 | * 2
0,6 + x = 2x + 2
x - 2x = 2 - 0,6
- x = 1,4
x = - 1,4
