1) x-10<span>≠0
x</span><span>≠10
2)</span>
<span>≠0
</span>
<span>≠1
</span> y≠<span>±1</span>
Вот, держи, надеюсь, тебе поможет (:
5 - (x + 3) = - 7(2x - 1) + 8
5 - x - 3 = - 14x + 7 + 8
- x + 2 = - 14x + 15
- x + 14x = 15 - 2
13x = 13
x = 1
Проверка
5 - (1 + 3) = 5 - 4 = 1
7*(2 - 1) - 8 = 7 - 8 = - 1