Question

Расчёска стоит х руб.,а заколка в 2 раза дороже.Сколько пятирублёвых монет надо отдать в кассу,чтобы заплатить за расчёску и заколку вместе?

Answer 1

1) 2x (руб.) - стоит заколка

2) x+2x = 3x (руб.) - стоят расческа и заколка вместе

3) 3x : 5 (шт.) - надо монет

Ответ: 3x : 5

Answer 2

Calculating the Cost of the Comb and Hairpin

To calculate the total cost of the comb and hairpin, we can use the given information that the comb costs x rubles and the hairpin costs 2 times the price of the comb.

Let's denote: - Cost of the comb = x rubles - Cost of the hairpin = 2x rubles

To find the total cost, we add the cost of the comb and the cost of the hairpin: Total cost = Cost of the comb + Cost of the hairpin Total cost = x + 2x

Calculating the Number of Five-Ruble Coins Required

Now, let's calculate the number of five-ruble coins needed to pay for the comb and hairpin together.

Assuming the number of five-ruble coins needed is n, the total value of these coins will be 5n rubles.

We can set up the equation: Total cost = 5n x + 2x = 5n 3x = 5n

To find the value of n, we divide both sides by 3: n = (3x) / 5

So, the number of five-ruble coins needed to pay for the comb and hairpin together is (3x) / 5.

Conclusion

Therefore, to pay for the comb and hairpin together, you would need to give (3x) / 5 five-ruble coins at the cash register.