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Dr. Lambert, a farm veterinarian, just weighed a pig and found out that it is 9 kilograms9\,\text{kilograms}, which is 10%10\% less than the last time he checked. How much did the pig weigh last time?\newline____ kilograms

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Q. Dr. Lambert, a farm veterinarian, just weighed a pig and found out that it is 9 kilograms9\,\text{kilograms}, which is 10%10\% less than the last time he checked. How much did the pig weigh last time?\newline____ kilograms
  1. Calculate Expression: Step 11: Let xx be the weight of the pig last time.\newlineCalculate the expression for 10%10\% less than the previous weight.\newlineExpression for current weight: x−10%(x)=x−0.1xx - 10\%(x) = x - 0.1x
  2. Set Up Equation: Step 22: We found: Expression for current weight is x−0.1xx - 0.1x We know: Value for current weight is 9 kg9 \, \text{kg} Set up an equation to find xx, the previous weight. Equation for current weight is 9=x−0.1x9 = x - 0.1x.
  3. Solve for x: Step 33: We found: 9=x−0.1x9 = x - 0.1x\newlineSolve for x.\newlinex−0.1x=9x - 0.1x = 9\newline0.9x=90.9x = 9\newlinex=90.9x = \frac{9}{0.9}\newlinex=10x = 10

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