Question

The model represents an equation. What value of X makes the equation true?

Answers are: -15
-3
15
3
Please help.

Answer 1

D. 3

Explanation:

Assuming the model represents an equation, the following can be deduced:

On the left side of the equation, the model shows we have 3 "x's", and 6 "1's". Let this represent:

3x + 6

On the right side of the equation, we have 2 "x's" and 9 "1's". Let this represent:

2x + 9.

The model would represent the equation below:

`3x + 6 = 2x + 9`

Solve for x

`3x + 6 - 2x = 2x + 9 - 2x` (Subtracting 2x from both sides of the equation)

`x + 6 = 9`

`x + 6 - 6 = 9 - 6` (subtracting 6 from both sides of the equation)

`x = 3`