Odpowiedź:
1.
5x + 2 = 18 - 3x
5x + 3x = 18 - 2
8x = 16
x = 2
2.
3 (x - 1) = 0 /:0
x - 1 = 0
x = 1
3.
(2x - 3) /4 = 1/2 + x /*4
2 x - 3 = 2 + 4x
2x - 4x = 2 + 3
-2x = 5
x = -5/2
4.
(x + 2 ) / 3 + (x - 1 ) / 3 = 1
x + 2 + x - 1 = 3
2x + 1 = 3
2x = 3 - 1
2x = 2
x = 1
Szczegółowe wyjaśnienie:
