4.0 dollars
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To find 10 percent of a value, multiply the value by 0.1. In this instance, 0.1 x 423 = 42.3. Don't forget to round to the appropriate number of decimal places: Therefore, 10 percent of $423 is equal to $42.30.
423.0
423% = 4.23 = 423/100 in fraction
x + 2x + 423 = 3x + 423
423