Давайте решим каждое уравнение по порядку.

1) ( 9x - 7x = 395.15 )

[ 2x = 395.15 ]

[ x = \frac{395.15}{2} = 197.575 ]

2) ( 4x + 7x = 271.15 )

[ 11x = 271.15 ]

[ x = \frac{271.15}{11} = 24.575 ]

3) ( 19x - 11x = 72.16 )

[ 8x = 72.16 ]

[ x = \frac{72.16}{8} = 9.02 ]

4) ( 22x - 19x = 18.9 )

[ 3x = 18.9 ]

[ x = \frac{18.9}{3} = 6.3 ]

5) ( 9x + x = 91.9 )

[ 10x = 91.9 ]

[ x = \frac{91.9}{10} = 9.19 ]

6) ( 30x + 20x + 9x = 2011.9 )

[ 59x = 2011.9 ]

[ x = \frac{2011.9}{59} \approx 34.1 ]

Теперь результаты для каждого уравнения:

1) ( x \approx 197.575 )
2) ( x \approx 24.575 )
3) ( x \approx 9.02 )
4) ( x \approx 6.3 )
5) ( x \approx 9.19 )
6) ( x \approx 34.1 )