Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Linear inequalities in one or two variables |
Grade: 1400-a Lesson: S1-L4 |
Explanation: The best way to understand SAT-2 is by looking at some examples. Take turns and read each example for easy understanding. |
Examples:
Solve the inequality 3x + 5 > 10.
Step 1a
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To solve this inequality, we’ll isolate the variable x 3x + 5 > 10 Subtract 5 from both sides: 3x + 5 - 5 > 10 - 5 3x > 5 Move the x coefficient to the right side: \$x > 5/3 \$. |
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Explanation: Separated the x term, subtracted 5, simplified to 3x > 5, then moved the x coefficient, resulting in \$x > 5/3\$. |
Solve the inequality \$ 5x - 9y le 8x + 3y - 4 \$.
Step 2a
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To solve the inequality, let’s simplify the expression first: \$ 5x - 9y le 8x + 3y - 4 \$ |
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Explanation: Here, simplify the equation. |
Step 2b
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To isolate the variables on one side, then move the y terms to the left side and the x terms to the right side: \$5x - 8x ≤ 3y + 9y - 4\$ Combine like terms \$-3x ≤ 12y - 4 \$ |
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Explanation: Split variables on each side, then group like terms together for simplification. |
Step 2c
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Now, let’s isolate the y terms by moving the x terms to the right side: \$-3x + 4 ≤ 12y\$ Divide both sides of the inequality by 12: \$ (-3/12)x + 4/12 ≤ y \$ Simplify: \$ (-1/4)x + 1/3 ≤ y \$ |
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Explanation: Isolate y, simplify, then divide by 12 to yield \$ (-1/4)x + 1/3 ≤ y \$. |
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