Final answer:
To simplify the expression 8.2c - 0.9 + (5.4 - 18d + 7.2c) ÷ 0.06, start by multiplying the terms inside the parentheses and then combine like terms.
Step-by-step explanation:
To simplify the expression 8.2c - 0.9 + (5.4 - 18d + 7.2c) ÷ 0.06, we can start by multiplying the terms inside the parentheses: 5.4 - 18d + 7.2c = -18d + 7.2c + 5.4. Then, we can combine like terms:
8.2c - 0.9 + (-18d + 7.2c + 5.4) ÷ 0.06 = 15.4c - 18d + 90
So, the simplified expression is 15.4c - 18d + 90.