Answer:
5.7a - 18.2b
Step-by-step explanation:
Step 1: Write the equation
(12.2a + 9.7b) – (18.1b – 0.2a) – (6.7a + 6.8b)
Step 2: Open all brackets
12.2a + 9.7b - 18.1b + 0.2a - 6.7a - 6.8b
Step 3: Arrange all 'a' together and all 'b' together
12.2a + 0.2a - 6.7a + 9.7b - 18.1b - 6.8b
Step 4: Simplify
5.7a - 18.2b
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