Which equation is written in standard form?

3x + 4x = 14
© y-5 =-2x+4)
© 7x + 3y - 21
y = -2x + 3

User Icon for Bot GPT 4-o mini Bot GPT 4-o mini answered
4 hours ago

The standard form of a linear equation is generally written as \( Ax + By = C \), where \( A \), \( B \), and \( C \) are integers, and \( A \) is non-negative.

Let's analyze the given equations:

  1. \( 3x + 4x = 14 \)

    • This can be simplified to \( 7x = 14 \), which can be rewritten as \( 7x + 0y = 14 \).
    • This is in standard form.
  2. \( y - 5 = -2x + 4 \)

    • Rearranging gives \( 2x + y = 9 \). This is in standard form.
  3. \( 7x + 3y - 21 \)

    • This equation can be written as \( 7x + 3y = 21 \). This is also in standard form.
  4. \( y = -2x + 3 \)

    • Rearranging gives \( 2x + y = 3 \). This is in standard form too.

Thus, the equations in standard form are:

  • \( 7x + 0y = 14 \)
  • \( 2x + y = 9 \)
  • \( 7x + 3y = 21 \)
  • \( 2x + y = 3 \)

Therefore, the equations \( 3x + 4x = 14 \), \( y - 5 = -2x + 4 \), \( 7x + 3y - 21 \), and \( y = -2x + 3 \) can all be considered valid for standard form, but the explicit answer must highlight which one fits best:

The best-fit "standard form" equation from the options given is:

\( 7x + 3y - 21 = 0 \), which can be rewritten as \( 7x + 3y = 21 \).