Question

3(2x-1)+5(3-x) при х=-1,5

Answer 1

Раскрываем сначала скобки и получаем : 6х - 3 + 15 - 5х;

Потом приводим подобные слагаемые.

Получается х+12

Потом вместо х мы подставляем число -1,5

И получаем: 10,5

Ответ: 10,5

Answer 2

6x+3+15-5x=x+18= -1,5+18=16,5

Answer 3

To find the value of the expression 3(2x-1) + 5(3-x) when x = -1.5, you simply need to substitute the value of x into the expression and perform the calculations.

Let's do that step by step:

1. Replace x with -1.5 in the expression: 3(2(-1.5) - 1) + 5(3 - (-1.5))

2. Simplify the expression inside the parentheses: 3(-3 - 1) + 5(3 + 1.5)

3. Continue simplifying: 3(-4) + 5(4.5)

4. Perform the multiplication: -12 + 22.5

5. Finally, add the results: -12 + 22.5 = 10.5

So, the value of the expression 3(2x-1) + 5(3-x) when x = -1.5 is 10.5.