Myra is evaluating the expression –31. 7 4. 5x, when x = 2. 1. -31. 7 4. 5(2. 1) –27. 2(2. 1) –57. 12 What was Myra’s error? Myra should have multiplied -31. 7 and 2. 1 first. Myra should have multiplied 4. 5 and 2. 1 first. Myra should have subtracted -27. 2 and 2. 1 first. Myra should have added -31. 7 and 2. 1 first.