Question: User: Name: ____________ Grade 8 Math Homework
Absolute Value Equations
Solve each equation. Show all steps and check your solutions.
1. |x| = 9
2. |x - 5| = 7
3. -4 |2x + 3| = -12
4. 3|x - 2| - 4 = 14
5. |4x - 8| = 0
6. -3|x + 6| = 9
Graph shape: a worksheet page with a 2-column by 3-row grid of problem boxes and thin dividing lines, position_hint=top-leftName: Grade 8 Math Homework
Compound Inequalities
Solve each compound inequality. Graph the solution.
7. -5 < 2x + 3 60; 11
8. -15 < -3x + 6 60; 15
9. 4x - 1 < -9 or 2x + 5 60; 13
10. -2x + 3 > 11 or 3x - 2 60; 10
Graph shapes and math:
Top-left: problem 7 asks to graph the compound inequality -5 < 2x + 3 60; 11.
Top-right: problem 8 asks to graph the compound inequality -15 < -3x + 6 60; 15.
Bottom-left: problem 9 asks to graph the compound inequality 4x - 1 < -9 or 2x + 5 60; 13.
Bottom-right: problem 10 asks to graph the compound inequality -2x + 3 > 11 or 3x - 2 60; 10.
solve in the picture do not say it do it in the picture
1. Solve |x| = 9
- The absolute value equation |x| = 9 means x can be 9 or -9.
- So, $x = 9$ or $x = -9$.
2. Solve |x - 5| = 7
- Set $x - 5 = 7$ or $x - 5 = -7$.
- For $x - 5 = 7$, $x = 12$.
- For $x - 5 = -7$, $x = -2$.
3. Solve -4|2x + 3| = -12
- Divide both sides by -4:
$$\cancel{-4}|2x + 3| = \cancel{-4}\frac{-12}{-4}$$
$$|2x + 3| = 3$$
- Set $2x + 3 = 3$ or $2x + 3 = -3$.
- For $2x + 3 = 3$, $2x = 0$, $x = 0$.
- For $2x + 3 = -3$, $2x = -6$, $x = -3$.
4. Solve 3|x - 2| - 4 = 14
- Add 4 to both sides:
$$3|x - 2| - 4 + 4 = 14 + 4$$
$$3|x - 2| = 18$$
- Divide both sides by 3:
$$\cancel{3}|x - 2| = \cancel{3}6$$
$$|x - 2| = 6$$
- Set $x - 2 = 6$ or $x - 2 = -6$.
- For $x - 2 = 6$, $x = 8$.
- For $x - 2 = -6$, $x = -4$.
5. Solve |4x - 8| = 0
- Absolute value equals zero only if the inside is zero:
$$4x - 8 = 0$$
- Solve for $x$:
$$4x = 8$$
$$x = 2$$
6. Solve -3|x + 6| = 9
- Divide both sides by -3:
$$\cancel{-3}|x + 6| = \cancel{-3}\frac{9}{-3}$$
$$|x + 6| = -3$$
- Absolute value cannot be negative, so no solution.
Final answers:
1. $x = 9$ or $x = -9$
2. $x = 12$ or $x = -2$
3. $x = 0$ or $x = -3$
4. $x = 8$ or $x = -4$
5. $x = 2$
6. No solution