Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Find the variable value in the equation |
Grade: 7-a Lesson: S1-L3 |
Explanation: The best way to understand algebra is by looking at some examples. Take turns and read each example for easy understanding. |
Examples:
1. Find the value of 'l' in \$3l + 4 = 7 − 2l\$.
Step 1a
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Given equation is that, \$3l + 4 = 7 − 2l\$. |
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Explanation:
Given equation is that, \$3l + 4 = 7 − 2l\$. It is a linear equation with one variable in "l". |
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Step 1b
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Move the like terms to one side. |
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Explanation: Move the like terms to one side of the equation and perform operations among them. i.e, move constant terms to one side. \$3l + 4 = 7 − 2l\$ |
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Step 1c
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Now, solve for "m" |
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Explanation:
Divide both sides of the equation with 5. ⇒ \$5l = 3\$ ⇒ \$(5l)/5 = 3/5\$ ⇒ \$((cancel5^1)l)/cancel5^1 = 3/5\$ ⇒ \$(5l)/1 = 3/5\$ ⇒ \$l = 3/5\$ |
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