Question

В елочной гирлянде 7 красных лампочек, синих на 6 больше,чем красных, а желтых -столько,сколько красных и синих вместе. Сколько в гирлянде жетых лампочек?

Answer 1

Синих - 7+6=13
жёлтых - 13+7= 20

Answer 2

7 красных
Синих 7+6=13
Желтых 7+13=20

Answer 3

Problem Analysis

We are given the information that there are 7 red bulbs in a Christmas garland, and the number of blue bulbs is 6 more than the number of red bulbs. Additionally, the number of yellow bulbs is equal to the sum of the red and blue bulbs. We need to determine the number of yellow bulbs in the garland.

Solution

Let's solve this step by step:

1. Let's assume the number of red bulbs is x. 2. According to the given information, the number of blue bulbs is 6 more than the number of red bulbs. So, the number of blue bulbs is x + 6. 3. The number of yellow bulbs is equal to the sum of the red and blue bulbs. So, the number of yellow bulbs is x + (x + 6), which simplifies to 2x + 6.

Therefore, the number of yellow bulbs in the garland is 2x + 6.

Calculation

To find the number of yellow bulbs, we need to find the value of x.

Let's solve the equation 2x + 6 = y, where y represents the number of yellow bulbs.

Subtracting 6 from both sides of the equation, we get 2x = y - 6.

Dividing both sides of the equation by 2, we get x = (y - 6) / 2.

Answer

The number of yellow bulbs in the garland can be calculated using the formula (y - 6) / 2, where y represents the total number of yellow, red, and blue bulbs in the garland.

Please provide the value of y (the total number of bulbs in the garland) so that we can calculate the number of yellow bulbs.