Evaluate
-143.3
Factor
-143.3
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209.4+2\times 212.8-3\times 205.7-161.2
Multiply 3 and 69.8 to get 209.4.
209.4+425.6-3\times 205.7-161.2
Multiply 2 and 212.8 to get 425.6.
635-3\times 205.7-161.2
Add 209.4 and 425.6 to get 635.
635-617.1-161.2
Multiply 3 and 205.7 to get 617.1.
17.9-161.2
Subtract 617.1 from 635 to get 17.9.
-143.3
Subtract 161.2 from 17.9 to get -143.3.
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