Which equations have the variable term in the equation –6 + 2x = 6x – 9 isolated to one side of the equals sign, and the constant isolated to the other side? Select all that apply.

–6 = 4x – 9
3 – 4x= 0
–4x = –3
3 = 4x
2x= 6x - 3

1 answer

To find the equations that have the variable term isolated on one side and the constant on the other, we first need to isolate \(2x\) from the original equation:

Starting with the original equation:

\[ -6 + 2x = 6x - 9 \]

Rearranging it to isolate the variable on one side and the constant on the other yields:

  1. Move all terms with \(x\) to one side: \[ -6 + 2x = 6x - 9 \implies -6 + 9 = 6x - 2x \]

This simplifies to:

\[ 3 = 4x \]

Now, we'll evaluate the given options:

  1. –6 = 4x – 9: We can rearrange this to isolate the variable and constant, yielding \(4x = 3\), which is not in the form we want since the constant is not isolated on the left side.

  2. 3 – 4x= 0: This can be rearranged to \(3 = 4x\), which matches our desired form of having \(4x\) on one side and \(3\) on the other.

  3. –4x = –3: This can be rewritten as \(4x = 3\), which does satisfy the condition of isolating the variable term from the constant.

  4. 3 = 4x: This is already in the desired form, with the variable on one side and the constant on the other.

  5. 2x= 6x - 3: Rearranging gives us \(6x - 2x = 3\), or equivalently \(4x = 3\), satisfying our requirement as well.

From the evaluations above, the equations that have the variable term isolated on one side and the constant on the other side are:

  • 3 – 4x = 0
  • –4x = –3
  • 3 = 4x
  • 2x = 6x - 3

So the selected equations are:

  • 3 – 4x = 0
  • –4x = –3
  • 3 = 4x
  • 2x = 6x - 3