Question

Arianna correctly simplified an expression. When she substituted x= 2 into the simplified expression, the value was –4. Which could be Arianna’s original expression?

1/6(-3x-24)
1/6(-5x-8)
1/6(-10x-4)
1/6(-12x-16

Answer 1

`(1)/(6) [-10x-4]`

Explanation:

Answer 2

`(1)/(6)(-10x-4)`

Explanation:

To solve this problem you must apply the proccedure shown below:

1. You have that she substituted
`x=2` into the simplified expression and the result was -4.

2. Therefore, if you substitute
`x=2` into all the expressions shown in the options, you will see that the result of the expression
`(1)/(6)(-10x-4)` is -4, as you can see below:

`(1)/(6)(-10(2)-4)=(1)/(6)(-24)=-4`