Question

Маша потратила 30% всех денег, и у неё осталось 280 руб. Сколько было денег у Маши?

Answer 1

100-30=70%
280-70%
x- 100%
x=100*280 /70=400!!!!!!!!!!!!!!!!!

Answer 2

100%-30%=70% денег осталось

составим пропорцию

  70%  -  280 руб.

100%   - х руб.

х= 280 * 100%/70%

х=400 руб. было у Маши

Answer 3

Calculation of Money Spent by Masha and Remaining Amount

To calculate the initial amount of money Masha had, we can use the information provided.

Let's denote the initial amount of money Masha had as x.

Masha spent 30% of her money and had 280 rubles left. We can represent this information in the form of an equation:

x - 0.30x = 280

Solving this equation will give us the initial amount of money Masha had.

Calculation

Using the equation x - 0.30x = 280:

x - 0.30x = 280 0.70x = 280 x = 280 / 0.70 x = 400

So, Masha initially had 400 rubles.

Therefore, the initial amount of money Masha had was 400 rubles.