Question

Банковский вклад в апреле уменьшился на 15%, а в мае увеличился на 15%, после чего на счету оказалось 78.200 рублей. сколько рублей составлял вклад на конец марта?​

Answer 1

Ответ:

80.000

Пошаговое объяснение:

78.200 :115*100/85*100

можно просто вбить в калькулятор а можно решить слобиком

Answer 2

Calculation of the Deposit Amount in March

To calculate the deposit amount at the end of March, we can work backwards from the given information.

Let's assume the deposit amount at the end of March is represented by the variable x.

According to the given information: - In April, the deposit decreased by 15%. - In May, the deposit increased by 15%. - The final amount in the account is 78,200 rubles.

Based on these conditions, we can set up the following equation:

x - 15% of x + 15% of (x - 15% of x) = 78,200

Now, let's solve this equation to find the value of x.

Solving the Equation

To solve the equation, we can follow these steps:

1. Calculate 15% of x: 0.15 * x 2. Calculate the new deposit amount after a 15% decrease: x - 0.15 * x 3. Calculate 15% of the new deposit amount: 0.15 * (x - 0.15 * x)

Now, let's substitute these values back into the equation:

x - 0.15 * x + 0.15 * (x - 0.15 * x) = 78,200

Simplifying the equation:

x - 0.15x + 0.15x - 0.0225x = 78,200

Combining like terms:

0.9775x = 78,200

Solving for x:

x = 78,200 / 0.9775

Calculating the value of x:

x ≈ 80,000

Therefore, the deposit amount at the end of March was approximately 80,000 rubles.

Please note that this calculation is based on the given information and assumes that the percentage changes in April and May are applied to the previous month's deposit amount.