Question

In the solution of the equation 5 - 3x = 2x + 9, 3x is added to the equation first. Which of the following should be done next? A) add -9. B) add -5. C) add -2x.

Answer 1

The choices are:

"add -9"

"add -5"

"add -2x"

the correct answer is "add -9"

I used the answer myself and it is correct!

Explanation:

Answer 2

we have

`5-3x=2x+9`

Solve for x

Step 1

Add
`3x` both sides

`5-3x+3x=2x+9+3x`

`5=5x+9`

Step 2

Add
`-9` both sides

`5-9=5x+9-9`

`-4=5x`

Step 3

Divide by
`5` both sides

`-4/5=5x/5`

`-4/5=x`

The value of x is equal to
`-4/5`

therefore

the answer is the option A

Add
`-9`