Question

В одной руке парное количество шариков а в другой непарное,Чему равна сумма произведения количества шариков в левой руке на 4 и количество в правой на 5.Ответили что 30. Сколько шариков в левой руке

Answer 1

4 было там в левой руке

Answer 2

Calculation of the Sum of Products

To find the sum of the products of the number of balls in the left hand multiplied by 4 and the number of balls in the right hand multiplied by 5, we can use the given information that the sum is equal to 30.

Let's assume that the number of balls in the left hand is represented by x and the number of balls in the right hand is represented by y.

According to the given information, we have the equation:

4x + 5y = 30.

To solve this equation, we can use various methods such as substitution or elimination. Let's use the substitution method.

We can rearrange the equation to solve for x:

4x = 30 - 5y.

Now, let's substitute this value of x into the equation:

4(30 - 5y) + 5y = 30.

Simplifying the equation:

120 - 20y + 5y = 30.

Combining like terms:

-15y = -90.

Dividing both sides by -15:

y = 6.

Now, substitute the value of y back into the equation to find x:

4x + 5(6) = 30.

Simplifying the equation:

4x + 30 = 30.

Subtracting 30 from both sides:

4x = 0.

Dividing both sides by 4:

x = 0.

Therefore, the number of balls in the left hand is 0.

Answer:

There are 0 balls in the left hand.