Solve the Linear Inequality: 4x+3 ≥ 11 Step-by-Step

Linear Inequalities with Positive Coefficients

Solve the following inequality:

4x+311 4x+3 \geq 11

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the following inequality:

4x+311 4x+3 \geq 11

2

Step-by-step solution

To solve the inequality 4x+311 4x+3 \geq 11 , follow these steps:

1. Subtract 3 from both sides: 4x8 4x \geq 8 .

2. Divide both sides by 4: x2 x \geq 2 .

3

Final Answer

x2 x \geq 2

Key Points to Remember

Essential concepts to master this topic
  • Rule: Solve inequalities like equations by isolating the variable
  • Technique: Subtract 3 first: 4x+33113 4x + 3 - 3 \geq 11 - 3
  • Check: Test x = 2: 4(2)+3=1111 4(2) + 3 = 11 \geq 11

Common Mistakes

Avoid these frequent errors
  • Flipping the inequality sign when dividing by positive numbers
    Don't flip the inequality sign when dividing by 4 = wrong direction! The sign only flips when multiplying or dividing by negative numbers. Always keep the same inequality direction when working with positive coefficients.

Practice Quiz

Test your knowledge with interactive questions

Solve the following inequality:

\( 3x+4 \leq 10 \)

FAQ

Everything you need to know about this question

When do I flip the inequality sign?

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Only when multiplying or dividing by a negative number! Since we divided by positive 4, the inequality direction stays the same: \geq remains \geq .

How is this different from solving equations?

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The steps are exactly the same as solving equations! The only difference is you must flip the inequality sign if you multiply or divide by a negative number.

What does x ≥ 2 mean on a number line?

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It means x can equal 2 or be greater than 2. On a number line, draw a filled circle at 2 and shade everything to the right.

Can I check my answer like I do with equations?

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Yes! Pick any value that satisfies your answer. Try x = 3: 4(3)+3=1511 4(3) + 3 = 15 \geq 11 ✓. Also test the boundary: x = 2 gives exactly 11.

What if I had gotten x ≥ -2 instead?

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Double-check your arithmetic! From 4x8 4x \geq 8 , dividing by 4 gives x2 x \geq 2 , not negative 2. Always verify each step carefully.

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