Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Simplify the expression |
Grade: 8-a Lesson: S1-L7 |
Explanation: The best way to understand algebra is by looking at some examples. Take turns and read each example for easy understanding. |
Examples:
1. Determine the value of expression \$3b + 2a − 3/c + 5a − 2b + 2/c\$ when b = 2, a = 3 and c = 1.
Step 1a
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The given expression is, \$3b + 2a − 3/c + 5a − 2b + 2/c\$. |
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Explanation:
The given expression is, \$3b + 2a − 3/c + 5a − 2b + 2/c\$. The expression contains variables in 'b', 'a' and 'c'. |
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Step 1b
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Perform operations among them. |
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Explanation: Perform operations according to PEMDAS rule. \$3b + 2a − 3/c + 5a − 2b + 2/c\$ First, do addition and then find the difference among the like terms. ⇒ \$2a + 5a + 3b - 2b - 3/c + 2/c\$ ⇒ \$7a + b - 1/c \$ |
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Step 1c
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Substitute the values of the variables in the expression. |
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Explanation: Substitute the values of the variables and perform operations ⇒ \$7a + b - 1/c \$ ⇒ \$7(3) + (2) - 1/1 \$ ⇒ \$21 + 2 - 1 \$ ⇒ \$23 - 1 \$ ⇒ \$22 \$ |
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