Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Proportion |
Grade: 8-a Lesson: S2-L6 |
Explanation: The best way to understand algebra is by looking at some examples. Take turns and read each example for easy understanding. |
Examples:
Solve for x \$(x + 3) : 5\$ = \$(x + 6) : 3\$
Step 1a
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Convert the provided proportion into a fraction \$(x + 3) /5\$ = \$(x + 6) / 3\$. |
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Explanation: Here, converting proportion into a fraction \$(x + 3) /5\$ = \$(x + 6) / 3\$. |
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Step 1b
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For this step, multiply the numbers using cross-multiplication |
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Explanation: Here, after multiply the numbers then we get \$3x + 9\$= \$5x + 30\$. |
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Step 1c
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In this step, \$5x - 2x = 30 - 9\$. |
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Explanation: Here, after simplification we get \$2x = 21\$. |
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Step 1d
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The value of x is 21 divided by 2, which equals 10.5. |
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Explanation: Here, after simplification we get x = 10.5. |
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