Найдите корень уравнения 2^x+2 - 2^x+1 =64

помогите , срочно надо !!!

 Choose the right word.

1. She didn't tell _nobody/anybody_ about her plans. (anybody is correct)

2. The accident looked serious but fortunately nobody/anybody was injured.

3.I looked out of the window but I couldn't see nobody/anybody. 

4. My job is very easy. _Nobody/Anybody_ could do it.

5. 'What's in that box?' _'Nothing/Anything._ It's empty.'

6. The situation is uncertain. _Nothing/Anything could happen.

7.I don't know _nothing/anything_ about economics. 

в бассейн проведены 3 трубы,через одну бассейн наполняется за 4 часа,через другую за 12 часов,а через третью за 9 часов. Какая часть бассейна наполнится если все три трубы открыть вместе на 2 часа?

решите систему неравенств: в фигурных скобочках -3x-7< - 4x - 3 -3x-7< - 2x