Math Problem Statement

Solve the following equations: 1. 3 / (x - 1) = 5 / (2x + 1) 2. 2x + 5 = 11 3. (3x + 1) / 2 = 5 4. x / 2 + 3 = 5 5. 3x - 2 = 16 6. x / 4 - 3 / 20 = x / 5

Solution

I will now extract and solve the equations from the image you uploaded. Let me process and analyze the content.### Solutions to the equations:

  1. Equation 1: 3x1=52x+1\frac{3}{x-1} = \frac{5}{2x+1}

    Cross-multiply: 3(2x+1)=5(x1)3(2x + 1) = 5(x - 1)

    Expand: 6x+3=5x56x + 3 = 5x - 5

    Simplify: x=8x = -8

    Answer: C) -8


  1. Equation 2: 2x+5=112x + 5 = 11

    Subtract 5: 2x=62x = 6

    Divide by 2: x=3x = 3

    Answer: B) x = 3


  1. Equation 3: 3x+12=5\frac{3x + 1}{2} = 5

    Multiply both sides by 2: 3x+1=103x + 1 = 10

    Subtract 1: 3x=93x = 9

    Divide by 3: x=3x = 3

    Answer: A) x = 3


  1. Equation 4: x2+3=5\frac{x}{2} + 3 = 5

    Subtract 3: x2=2\frac{x}{2} = 2

    Multiply by 2: x=4x = 4

    Answer: B) x = 4


  1. Equation 5: 3x2=163x - 2 = 16

    Add 2: 3x=183x = 18

    Divide by 3: x=6x = 6

    Answer: C) x = 6


  1. Equation 6: x4320=x5\frac{x}{4} - \frac{3}{20} = \frac{x}{5}

    Find a common denominator (20): 5x20320=4x20\frac{5x}{20} - \frac{3}{20} = \frac{4x}{20}

    Simplify: 5x320=4x20\frac{5x - 3}{20} = \frac{4x}{20}

    Cancel the denominator: 5x3=4x5x - 3 = 4x

    Solve for xx: x=3x = 3

    Answer: A) x = 3


If you need further explanations or a breakdown of any specific question, let me know! Here are some related questions:

  1. How do cross-multiplication rules work in fractions?
  2. Why is it important to check for extraneous solutions in rational equations?
  3. How can simplifying fractions help solve equations like in Question 6?
  4. What is the significance of isolating xx in linear equations?
  5. How do denominators affect the solving of fractional equations?

Tip: Always double-check solutions by plugging them back into the original equation!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Rational Equations

Formulas

Cross-multiplication for rational equations: a/b = c/d implies ad = bc
Isolating x in linear equations: ax + b = c

Theorems

Properties of Equality
Cross-multiplication Rule for Proportions

Suitable Grade Level

Grades 7-9