10x - 4x = 2,226
6x = 2,226
x = 2,226 / 6
x = 0,371
6x + 2x + 2,352 = 4,2
8x = 4,2 - 2,352
8x = 1,848
x = 1,848 / 8
x = 0,231
7x - 10,36 = 6,51
7x = 6,51 + 10,36
7x = 16,87
x = 16,87 / 7
x = 2,41
4,42 - 14x = 3,3
14x = 4,42 - 3,3
14x = 1,12
x = 1,12 / 14
x = 0,08
Ответ: 1) x = 0,371; 2) x = 0,231; 3) x = 2,41; 4) x = 0,08.