Question

8(-1,5х + 6) – (1 – 3,4х) – 3(0,8х + 6) и вычислите его значение при х = 5/22.

Answer 1

Ответ:

Пошаговое объяснение:

8(-1,5х + 6) – (1 – 3,4х) – 3(0,8х + 6) =

= -12х + 48 - 1 + 3,4х - 2,4х - 18 =

= -11х - 29

при х = 5/22

- 11×5/22 - 29 = - 5/2 - 29 = -2,5 - 29 = - 31,5

Answer 2

To evaluate the expression 8(-1.5x + 6) - (1 - 3.4x) - 3(0.8x + 6) with x = 5/22, we substitute the value of x into the expression and perform the calculations step by step.

Given: x = 5/22

Let's simplify the expression:

Step 1: Substitute the value of x into the expression.

8(-1.5 * (5/22) + 6) - (1 - 3.4 * (5/22)) - 3(0.8 * (5/22) + 6)

Step 2: Simplify the multiplication and addition/subtraction operations inside parentheses.

8(-7.5/22 + 6) - (1 - 17/22) - 3(4/22 + 6)

Step 3: Continue simplifying the expression.

8(-7.5/22 + 6) - (1 - 17/22) - 3(4/22 + 6) = 8(-7.5/22 + 6) - (1 - 17/22) - 3(4/22 + 6/1)

Step 4: Evaluate the expressions inside parentheses and perform the calculations.

= 8(-7.5/22 + 6) - (1 - 17/22) - 3(4/22 + 6/1) = 8(-7.5/22 + 6) - (1 - 17/22) - 3(0.1818 + 6)

Step 5: Simplify the calculations further.

= 8(-0.3409 + 6) - (1 - 17/22) - 3(0.1818 + 6) = 8(5.6591) - (1 - 17/22) - 3(0.1818 + 6)

Step 6: Evaluate the expressions within parentheses.

= 45.2728 - (1 - 17/22) - 3(0.1818 + 6) = 45.2728 - (1 - 0.7727) - 3(0.1818 + 6)

Step 7: Simplify further.

= 45.2728 - 0.2273 - 3(0.1818 + 6) = 45.2728 - 0.2273 - 3(6.1818)

Step 8: Perform the remaining multiplication.

= 45.2728 - 0.2273 - 18.5454

Step 9: Perform the remaining subtraction.

= 45.0455 - 18.5454 = 26.5

Therefore, the value of the expression 8(-1.5x + 6) - (1 - 3.4x) - 3(0.8x + 6) when x = 5/22 is 26.5.