Question

А) 0,6х= - 0,36. ; б) 0,3(5х-7)=3(0,2х+3,2) пошагово пожалуйста

Answer 1

Так подойдёт?)
Когда мы раскрываем скобки с множитель, то перемножаем на этот множитель каждое число скобки, например
6(2+3)=6*2+6*3
6 это множитель за скобкой

Answer 2

А) x=-0,36/0,6
x=-0,6
б)0,15x-0,21=0,6x+9,6
-0,45x=9,81
x=-9,81/0,45
x=-21,8

Answer 3

Sure, I'll solve both equations step by step for you:

А) 0.6x = -0.36

Step 1: To solve for x, isolate x on one side of the equation. To do this, we'll get rid of the coefficient 0.6 by dividing both sides by 0.6.

(0.6x) / 0.6 = (-0.36) / 0.6

Step 2: The 0.6 on the left side cancels out, leaving us with:

x = -0.36 / 0.6

Step 3: Now, let's calculate the value of x:

x = -0.6

So, the solution to the equation is x = -0.6.

б) 0.3(5x - 7) = 3(0.2x + 3.2)

Step 1: Distribute the multiplication on both sides of the equation.

0.3 * 5x - 0.3 * 7 = 3 * 0.2x + 3 * 3.2

1.5x - 2.1 = 0.6x + 9.6

Step 2: Now, let's isolate x terms on one side and constants on the other side. We'll move 0.6x to the left side by subtracting 0.6x from both sides, and move -2.1 to the right side by adding 2.1 to both sides.

1.5x - 0.6x = 9.6 + 2.1

0.9x = 11.7

Step 3: Finally, solve for x by dividing both sides by 0.9.

x = 11.7 / 0.9

Step 4: Calculate the value of x:

x = 13

So, the solution to the equation is x = 13.