At Tampines Mall, Siti tracks her shopping using $a$ for T-shirts and $b$ for books. Her total can be written as $8a + 5b - 3a + 2b$. Simplify this expression by combining like terms.
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Worked Solution
Step 1: Group the like terms together: (8a - 3a) + (5b + 2b).\n
Step 2: Combine the a terms: 8a - 3a = 5a.\n
Step 3: Combine the b terms: 5b + 2b = 7b.\n
Step 4: Write the simplified expression: 5a + 7b.
Answer: 5a + 7b
Correct answer: 5a + 7b
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