Question

Пример 0,6(4х-1,8)-0,4(5-7х) при х=1

Answer 1

Ответ:

0,6(4х-1,8)-0,4(5-7х)=2,4х-1,08-2+2,8х=5,2х-3,08

при х=1    5,2х-3,08=5,2*1-3,08=2,12

Пошаговое объяснение:

Answer 2

1. Упрощаем выражение:

$\displaystyle \tt 0,6\cdot(4x-1,8)-0,4\cdot(5-7x)=2,4x-1,08-2+2,8x=\underline{5,2x-3,08}$

2. Подставляем значение и вычисляем:

$\displaystyle \tt 5,2\cdot1-3,08=5,2-3,08=\bold{2,12}$

Ответ: $\displaystyle \tt 2,12$

Answer 3

To find the value of the expression 0.6(4x - 1.8) - 0.4(5 - 7x) when x = 1, you simply substitute x with 1 in the expression and perform the calculations. Here's how you do it step-by-step:

Step 1: Replace x with 1 in the expression: 0.6(4 * 1 - 1.8) - 0.4(5 - 7 * 1)

Step 2: Perform the calculations inside the parentheses: 0.6(4 - 1.8) - 0.4(5 - 7)

Step 3: Continue the calculations: 0.6(2.2) - 0.4(-2)

Step 4: Complete the calculations: 1.32 + 0.8

Step 5: Add the results: 1.32 + 0.8 = 2.12

So, when x = 1, the value of the expression is 2.12.