Question

8(0,7x+4)+2(0,2x-3)=86СРОООООЧНОООО​

Answer 1

Ответ:

8(0,7x+4)+2(0,2x-3)=86

Раскрываем скобки «фонтанчиком»

8*0,7х+8*4+2*0,2х-2*3=86

5,6х+32+0,4х-6=86

6х+26=86

6х=86-26

6х=60

х=10

Проверка:

8(0,7*10+4)+2(0,2*10-3)=86

8*11+2*(-1)=86

88-2=86

86=86

Answer 2

To solve the equation 8(0.7x+4) + 2(0.2x-3) = 86, follow these steps:

1. Distribute the constants outside the parentheses to the terms inside:

   8 * 0.7x + 8 * 4 + 2 * 0.2x - 2 * 3 = 86

2. Simplify each term:

   5.6x + 32 + 0.4x - 6 = 86

3. Combine like terms:

   5.6x + 0.4x + 32 - 6 = 86

   6x + 26 = 86

4. Now, isolate the variable x by subtracting 26 from both sides:

   6x + 26 - 26 = 86 - 26

   6x = 60

5. Finally, divide both sides by 6 to find the value of x:

   (6x) / 6 = 60 / 6

   x = 10

So, the solution to the equation is x = 10.