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21.3+r=−19.7921.3 + r = -19.79

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Full solution

Q. 21.3+r=−19.7921.3 + r = -19.79
  1. Identify operation for r: Step 11: Identify the operation needed to isolate r.\newlineTo solve for r, we need to get r by itself on one side of the equation. This means we need to subtract 21.321.3 from both sides of the equation.\newlineCalculation: −19.79−21.3-19.79 - 21.3
  2. Perform subtraction for rr: Step 22: Perform the subtraction to find the value of rr.\newlineCalculation: −19.79−21.3=−41.09-19.79 - 21.3 = -41.09

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