Odpowiedź:
A)
3x-8= - 7
3x = -7 + 8 /:3
x = 1/3
b)
4x - 2 = -2
4x = -2 + 2 /:4
x = 0/4 = 0
c)
15x + 19 = 10
15x = 10 - 19 /:15
x = -9/15 = -3/5
d)
2x +9=1
2x = 1 - 9 /:2
x = -8/2 = -4
e)
7x -9=5
7x = 5 + 9 /:7
x = 14/7 = 2
f)
8x + 5 = -7
8x = -7 - 5 /:8
x = -12/5 = -2 2/5
g)
9x - 40 = 14
h)
20x +7 = 31
20x = 31 - 7 /:20
x = 24/20 = 1 4/20 = 1 1/5
i)
6x - 25 = x - 1
6x - x = -1 + 25
5x = 24 /:5
x = 24/5 = 4 4/5
Szczegółowe wyjaśnienie:
