Math Problem Statement

2|x-1|=8+2x

Solution

Let's solve the equation 2x1=8+2x2|x - 1| = 8 + 2x.

Step 1: Simplify both sides

Divide both sides of the equation by 2 to make it easier to work with:

x1=4+x|x - 1| = 4 + x

Step 2: Break into two cases

Since we're dealing with an absolute value equation, we must consider two cases: when the expression inside the absolute value is positive, and when it's negative.

Case 1: x10x - 1 \geq 0 (i.e., x1x \geq 1)

In this case, x1=x1|x - 1| = x - 1. The equation becomes:

x1=4+xx - 1 = 4 + x

Subtract xx from both sides:

1=4-1 = 4

This is a contradiction, so there is no solution for this case.

Case 2: x1<0x - 1 < 0 (i.e., x<1x < 1)

In this case, x1=(x1)=x+1|x - 1| = -(x - 1) = -x + 1. The equation becomes:

x+1=4+x-x + 1 = 4 + x

Now, solve for xx:

  1. Add xx to both sides: 1=4+2x1 = 4 + 2x

  2. Subtract 4 from both sides: 3=2x-3 = 2x

  3. Divide by 2: x=32x = -\frac{3}{2}

Final Answer:

The solution is x=32x = -\frac{3}{2}.

Would you like further clarification on any part of this? Here are some related questions for practice:

  1. Solve: x+2=3x+1|x + 2| = 3x + 1.
  2. Solve: 3x4=5x+93|x - 4| = 5x + 9.
  3. Solve: 2x+5=x1|2x + 5| = x - 1.
  4. Solve: 4x+1=x234|x + 1| = x^2 - 3.
  5. Solve: x3+2x=7|x - 3| + 2x = 7.

Tip: When dealing with absolute value equations, always remember to consider both positive and negative cases separately.

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Equations
Linear Equations

Formulas

Absolute value equation: |x - a| = b
Linear equation: ax + b = 0

Theorems

Properties of absolute value: |x| = x if x >= 0, and |x| = -x if x < 0

Suitable Grade Level

Grades 8-10