Odpowiedź:
Szczegółowe wyjaśnienie:
1) 4x - 19 + 2x = 23
6x = 23 + 19
6x = 42 / ÷ 6
x = 7
2) 7x + 6 - 5x = 24
2x = 24 - 6
2x = 18 / ÷ 2
x = 9
3) 9x + 12 - 3x = 18
6x = 18 - 12
6x = 6 / ÷ 6
x = 1
4) 2x = 12 - 4x
2x + 4x = 12
6x = 12 / ÷ 6
x = 2
5) 3x = x + 10
3x - x = 10
2x = 10 / ÷ 2
x = 5
6) 5x = 3x - 12
5x - 3x = - 12
2x = - 12 / ÷ 2
x = - 6