Odpowiedź:
7x - 19 = 6x
7x - 6x = 19
x = 19
2x + 5 = 19
2x = 19 - 5
2x = 14 /:2
x = 7
x - 4 = 3x +19
-4 - 19 = 3x - x
-23 = 2x /:2
-23/2 = x
3(x + 5) = 2x -19
3x + 15 = 2x - 19
3x - 2x = -19 - 15
x = -34
19 - (x + 1) = 0
19 - x - 1 = 0
18 = x
x - (4x + 19)/5 = 0 /*5
5x - 4x - 19 = 0
Szczegółowe wyjaśnienie:
