Question

-6(0.5-1.5)-4.5x-8 при x=2/3 упростите и надите значение

Answer 1

$- 6(0.5 - 1.5) - 4.5x - 8 = - 6( - 1) - 4.5x - 8 = - 4.5x - 2$

При x = $\frac{2}{3}$:

$- 4.5 \times \frac{2}{3} - 2 = - \frac{9}{3} - 2 = - 3 - 2 = - 5$

Ответ: -5.

Answer 2

To simplify the expression and find the value when x = 2/3, follow these steps:

Step 1: Replace x with 2/3 in the expression.

Step 2: Perform the operations following the order of operations (PEMDAS/BODMAS).

PEMDAS/BODMAS stands for:

P - Parentheses E - Exponents (Powers and Roots) MD - Multiplication and Division (from left to right) AS - Addition and Subtraction (from left to right)

Let's start with the calculation:

Expression: -6(0.5 - 1.5) - 4.5x - 8

Step 1: Replace x with 2/3:

-6(0.5 - 1.5) - 4.5(2/3) - 8

Step 2: Perform the operations inside the parentheses first:

-6(-1) - 4.5(2/3) - 8

Step 3: Continue with the multiplication and division:

6 - 3 - 8

Step 4: Finally, perform the addition and subtraction from left to right:

(6 - 3) - 8 = 3 - 8 = -5

So, when x = 2/3, the simplified value of the expression is -5.