How do you answer these questions?

For the equations below which statement is true ? -2x=14 6x=-42

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy.how much will she pay after the discount

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p.mc) knowing that it is going to rain tomorrow, and going to bed before 9 p.md) knowing that you have a test in school tomorrow, and studying thw night before