Question

Помогите с уравнениями. Пожалуйста! 0,3x + 2,4x=270 0,2*(4x + x)=12 2x + x + 0,6=4,2 40*1,25*0,8*2,5= Помогите мне пожалуйста, я совсем ничего не понимаю!

Answer 1

1) 2,7х=270
х=270:2,7
х=100

2) 0,8х+0,2х=12
х=12

3) 3х+0,6=4,2
3х=4,2-0,6
3х=3,6
х=3,6:3
х=1,2

(40*2,5)*(1,25*0,8)=100*1=100

Answer 2

Solving the Equations

Let's solve the given equations step by step:

1. 0.3x + 2.4x = 270

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

0.3x + 2.4x = 270 (0.3 + 2.4)x = 270 2.7x = 270

Now, we can isolate x by dividing both sides of the equation by 2.7:

2.7x / 2.7 = 270 / 2.7 x = 100

So, the solution to the first equation is x = 100.

2. 0.2*(4x + x) = 12 + 2x + x + 0.6

Let's simplify both sides of the equation:

0.2*(4x + x) = 12 + 2x + x + 0.6 0.2*5x = 12 + 3x + 0.6 x = 12 + 3x + 0.6

To isolate x, we can subtract 3x from both sides of the equation:

x - 3x = 12 + 3x + 0.6 - 3x -2x = 12 + 0.6 -2x = 12.6

Now, divide both sides of the equation by -2:

-2x / -2 = 12.6 / -2 x = -6.3

So, the solution to the second equation is x = -6.3.

3. 40 * 1.25 * 0.8 * 2.5 = ?

To solve this equation, we can simply multiply the given numbers:

40 * 1.25 * 0.8 * 2.5 = 40 * 2 * 1 * 2.5 = 200

So, the solution to the third equation is 200.

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