Math Problem Statement

∣3x−10∣−2=5x

Solution

Let's solve the equation:

3x102=5x|3x - 10| - 2 = 5x

Step 1: Isolate the absolute value

First, add 2 to both sides of the equation: 3x10=5x+2|3x - 10| = 5x + 2

Step 2: Consider the two cases of the absolute value

Case 1: 3x1003x - 10 \geq 0

If 3x1003x - 10 \geq 0, then 3x10=3x10|3x - 10| = 3x - 10. The equation becomes: 3x10=5x+23x - 10 = 5x + 2 Now solve for xx: 3x5x=2+103x - 5x = 2 + 10 2x=12-2x = 12 x=6x = -6

Next, check if x=6x = -6 satisfies the condition 3x1003x - 10 \geq 0: 3(6)10=1810=283(-6) - 10 = -18 - 10 = -28 Since 28<0-28 < 0, this value doesn't satisfy the condition for Case 1. Therefore, x=6x = -6 is not a valid solution here.

Case 2: 3x10<03x - 10 < 0

If 3x10<03x - 10 < 0, then 3x10=(3x10)=3x+10|3x - 10| = -(3x - 10) = -3x + 10. The equation now becomes: 3x+10=5x+2-3x + 10 = 5x + 2 Solve for xx: 102=5x+3x10 - 2 = 5x + 3x 8=8x8 = 8x x=1x = 1

Check if x=1x = 1 satisfies 3x10<03x - 10 < 0: 3(1)10=310=73(1) - 10 = 3 - 10 = -7 Since 7<0-7 < 0, x=1x = 1 is valid.

Conclusion

The only valid solution is: x=1\boxed{x = 1}

Would you like more details or have any questions?

5 Related Questions

  1. How would the solution change if the absolute value equation was 3x10+2=5x|3x - 10| + 2 = 5x?
  2. Can you solve x+4=3x2|x + 4| = 3x - 2?
  3. What are the general steps for solving absolute value equations?
  4. How would we solve the inequality 3x105x+2|3x - 10| \leq 5x + 2?
  5. Can you graph y=3x10y = |3x - 10| and y=5x+2y = 5x + 2 to visualize their intersection?

Tip

Always check the validity of your solutions with absolute value equations, as not all solutions obtained will necessarily satisfy the original conditions.

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Equations
Linear Equations

Formulas

|a| = a if a ≥ 0, and |a| = -a if a < 0
Isolating absolute value terms

Theorems

Absolute Value Properties
Linear Equation Solving

Suitable Grade Level

Grades 9-11