The answer is -4.2.
To solve this, we follow the order of operations, which is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).
First, we perform the multiplication:
3.5 + 5.2 - 2 x 6.1
= 3.5 + 5.2 - 12.2
Next, we perform the addition and subtraction from left to right:
3.5 + 5.2 - 12.2
= 8.7 - 12.2
= -3.5
Therefore, the final answer is -3.5.
3.5+5.2-2×6.1
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