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What value of aa is a solution to this equation?\newline9a=639a = 63\newlineChoices:\newline(A)a=7a = 7\newline(B)a=8a = 8

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Q. What value of aa is a solution to this equation?\newline9a=639a = 63\newlineChoices:\newline(A)a=7a = 7\newline(B)a=8a = 8
  1. Identify Operation: Identify the operation needed to isolate the variable aa. The equation is 9a=639a = 63, which means 99 times some number aa equals 6363. To find the value of aa, we need to perform the inverse operation of multiplication, which is division.
  2. Divide by 99: Divide both sides of the equation by 99 to solve for aa. To isolate aa, we divide both sides of the equation by 99. This gives us a=639a = \frac{63}{9}.
  3. Perform Division: Perform the division to find the value of aa. Calculating 6363 divided by 99 gives us a=7a = 7.
  4. Check Solution: Check the solution by substituting the value of aa back into the original equation.\newlineSubstitute a=7a = 7 into the original equation: 9a=639a = 63 becomes 9(7)=639(7) = 63. Calculating 9×79 \times 7 gives us 6363, which matches the right side of the equation.