Question

6x + 9 + 2x при x = - 7

Answer 1

6х + 9 + 2х =

8х + 9 , при х = - 7

8 • ( - 7 ) + 9 = - 56 + 9 = - 47

Ответ : - 47

Answer 2

6(-7)+9+2(-7)=(-42)+9+(-14)=-47

Answer 3

To evaluate the expression 6x + 9 + 2x when x = -7, you simply substitute -7 in place of x and perform the arithmetic:

6(-7) + 9 + 2(-7)

Now, follow the order of operations (PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction) to simplify the expression:

6(-7) = -42 2(-7) = -14

Now the expression becomes:

-42 + 9 - 14

Combine like terms:

-42 - 14 + 9 = -47

So, when x = -7, the expression 6x + 9 + 2x evaluates to -47.