Question

Решите уравнения пожалуйста 1. 0,11x + 0,08x=45,6 2.(x+9,14):7,2=5 3.(2,04-1 1/4): 1/20 Даю 20 баллов! Мне сегодня надо сделать

Answer 1

Ответ:

1) 0,11х + 0,08х = 45,6

    0,19х = 45,6

    x = 45,6 : 0,19

    х = 240

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   0,11 * 240 + 0,08 * 240 = 45,6

                       26,4 + 19,2 = 45,6

                                   45,6 = 45,6

2) 2,9х - 1,1х = 5,04

    1,8х = 5,04

    х = 5,04 : 1,8

    х = 2,8

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   2,9 * 2,8 - 1,1 * 2,8 = 5,04

                8,12 - 3,08 = 5,04

                           5,04 = 5,04

3) х - 0,64х = 2,808

    0,36х = 2,808

    х = 2,808 : 0,36

    х = 7,8

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   7,8 - 0,64 * 7,8 = 2,808

         7,8 - 4,992 = 2,808

                  2,808 = 2,808

Answer 2

Solving the Equations

Let's solve the equations step by step.

Equation 1: 0.11x + 0.08x = 45.6

To solve this equation, we can combine the like terms on the left side of the equation:

0.11x + 0.08x = 0.19x

So the equation becomes:

0.19x = 45.6

To isolate x, we can divide both sides of the equation by 0.19:

x = 45.6 / 0.19

Calculating this, we find that x is approximately 240.

Equation 2: (x + 9.14) / 7.2 = 5 + (2.04 - 1 + 1/4) / (1/20)

To solve this equation, let's simplify the right side first:

5 + (2.04 - 1 + 1/4) / (1/20)

= 5 + (2.04 - 1 + 0.25) / (0.05)

= 5 + (1.29) / (0.05)

= 5 + 25.8

= 30.8

Now, let's rewrite the equation:

(x + 9.14) / 7.2 = 30.8

To isolate x, we can multiply both sides of the equation by 7.2:

x + 9.14 = 30.8 * 7.2

Calculating this, we find that x + 9.14 is approximately 221.76.

To isolate x, we can subtract 9.14 from both sides of the equation:

x = 221.76 - 9.14

Calculating this, we find that x is approximately 212.62.

Therefore, the solutions to the given equations are: - x ≈ 240 for the first equation. - x ≈ 212.62 for the second equation.

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