Math Problem Statement

-27 > -4x - 7 and -35 ≥ -4x - 7

Solution

The image contains a system of inequalities:

27>4x7and354x7-27 > -4x - 7 \quad \text{and} \quad -35 \geq -4x - 7

Solving the first inequality:

27>4x7-27 > -4x - 7

  1. Add 7 to both sides: 27+7>4x-27 + 7 > -4x 20>4x-20 > -4x
  2. Divide by -4, remembering to reverse the inequality because we are dividing by a negative number: 204<x\frac{-20}{-4} < x 5<xorx>55 < x \quad \text{or} \quad x > 5

Solving the second inequality:

354x7-35 \geq -4x - 7

  1. Add 7 to both sides: 35+74x-35 + 7 \geq -4x 284x-28 \geq -4x
  2. Divide by -4, again reversing the inequality: 284x\frac{-28}{-4} \leq x 7xorx77 \leq x \quad \text{or} \quad x \geq 7

Solution:

Now combine both inequalities: x>5andx7x > 5 \quad \text{and} \quad x \geq 7 This simplifies to: x7x \geq 7

Thus, the solution to the system of inequalities is x7x \geq 7.

Would you like more details or clarifications?

Here are 5 related questions to further explore this topic:

  1. How do you handle inequalities when multiplying or dividing by negative numbers?
  2. Can you explain how to represent this solution on a number line?
  3. How would the solution change if the inequalities were reversed?
  4. What if the inequality signs were strict (e.g., >> instead of \geq)?
  5. How can you check if a solution satisfies both inequalities?

Tip: Always remember to reverse the inequality symbol when multiplying or dividing by a negative number.

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Math Problem Analysis

Mathematical Concepts

Algebra
Inequalities

Formulas

Linear inequalities

Theorems

Inequality reversal when dividing by a negative number

Suitable Grade Level

Grades 8-10