Question

1зад. 15-x=2(x-30) 2 зад. 5(2x-1)-4(3x+1)=2 3 зад. За игрушку в подарочной упаковке заплатили 324 р. Стоимость упаковки составила 8% от стоимости игрушки. Сколько стоит игрушка?

Answer 1

1) 15-х=2х-60

    -3х=-75

   х=25

2)5(2х-1)-4(3х+1)=2

    -2х-9=2

      -2х=11

   х= минус 11 вторых(дробью)

 

 

3)324/0.64=506.25(вроде так,но могу ошибаться) 

Answer 2

Solving the Equations

Let's solve the given equations step by step.

Equation 1: 15 - x = 2(x - 30) + 2

To solve this equation, we will start by simplifying both sides:

15 - x = 2x - 60 + 2

Next, we will combine like terms:

15 - x = 2x - 58

Now, let's isolate the variable x by moving all the terms with x to one side:

-x - 2x = -58 - 15

Simplifying further:

-3x = -73

Finally, we can solve for x by dividing both sides of the equation by -3:

x = 73/3

Equation 2: 5(2x - 1) - 4(3x + 1) = 2 + 3

Similarly, we will simplify and solve this equation step by step:

10x - 5 - 12x - 4 = 5

Combine like terms:

-2x - 9 = 5

Isolate the variable x:

-2x = 5 + 9

Simplifying further:

-2x = 14

Solve for x by dividing both sides by -2:

x = -7

Finding the Cost of the Toy

Now, let's move on to the problem about the cost of the toy.

The cost of the toy is given as 324 rubles, and the cost of the packaging is 8% of the toy's cost.

To find the cost of the toy, we need to subtract the cost of the packaging from the total cost.

Let's calculate it:

Cost of the packaging = 8% of the toy's cost = 0.08 * 324 = 25.92 rubles

Cost of the toy = Total cost - Cost of the packaging = 324 - 25.92 = 298.08 rubles

Therefore, the cost of the toy is 298.08 rubles.

I hope this helps! Let me know if you have any further questions.