2 x minus 6less than7 left parenthesis x plus 2 right parenthesis

1 answer

To solve the inequality \( 2x - 6 < 7(x + 2) \), we will first expand the right-hand side and then isolate \( x \).

  1. Expand the right-hand side:

    \[ 7(x + 2) = 7x + 14 \]

    So the inequality becomes:

    \[ 2x - 6 < 7x + 14 \]

  2. Next, let's isolate the \( x \) terms. Subtract \( 2x \) from both sides:

    \[ -6 < 7x - 2x + 14 \]

    This simplifies to:

    \[ -6 < 5x + 14 \]

  3. Now, subtract 14 from both sides:

    \[ -6 - 14 < 5x \]

    Which simplifies to:

    \[ -20 < 5x \]

  4. Finally, divide each side by 5:

    \[ -4 < x \]

This can also be written as:

\[ x > -4 \]

So the solution to the inequality \( 2x - 6 < 7(x + 2) \) is:

\[ x > -4 \]