1) 2.27 - 2x = 0.95
2.27 - 0.95 = 2x
1.32 = 2x
x = 1.32 / 2
x = 0.66

2) 95.08 + 12x = 29.74
12x = 29.74 - 95.08
12x = -65.34
x = -65.34 / 12
x = -5.445

Проверим ответы подставив их в уравнения:
1) 2.27 - 2 * 0.66 = 0.95
2.27 - 1.32 = 0.95
0.95 = 0.95 - верно

2) 95.08 + 12 * (-5.445) = 29.74
95.08 - 65.34 = 29.74
29.74 = 29.74 - верно

Ответ: x1 = 0.66; x2 = -5.445