Solve and graph this inequality: 5(3 - x) < -2x +6

1 answer

To solve the inequality \( 5(3 - x) < -2x + 6 \), we will start by distributing and simplifying both sides.

Step 1: Distribute on the left side

\[ 5(3 - x) = 15 - 5x \] So the inequality becomes: \[ 15 - 5x < -2x + 6 \]

Step 2: Add \( 5x \) to both sides

\[ 15 < -2x + 5x + 6 \] This simplifies to: \[ 15 < 3x + 6 \]

Step 3: Subtract 6 from both sides

\[ 15 - 6 < 3x \] This simplifies to: \[ 9 < 3x \]

Step 4: Divide by 3

\[ \frac{9}{3} < x \] This simplifies to: \[ 3 < x \] or expressed alternatively, \[ x > 3 \]

Step 5: Graph the solution

To graph the solution \( x > 3 \):

  1. Draw a number line.
  2. Put an open circle on the number 3 to indicate that 3 is not included in the solution set.
  3. Shade the line to the right of 3 to indicate that all values greater than 3 are included.

Thus, the solution to the inequality is \( x > 3 \), which you can represent graphically as described.