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Which one of the following is the solution of the equation 5𝑎−23=3𝑎+11 ?ResponsesA 1919B 1717C 1515D 1313E

Question

Which one of the following is the solution of the equation

5𝑎−23=3𝑎+11 ?

Responses
A 19 19
B 17 17
C 15 15
D 13 13
E

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Solution

1. Break Down the Problem

We need to solve the equation 5a23=3a+115a - 23 = 3a + 11 for the variable aa. This involves isolating the variable on one side of the equation.

2. Relevant Concepts

To isolate aa, we will use basic algebraic principles, including:

  • Adding or subtracting the same value from both sides of the equation.
  • Combining like terms.

3. Analysis and Detail

  1. Start with the original equation: 5a23=3a+11 5a - 23 = 3a + 11

  2. Subtract 3a3a from both sides: 5a3a23=11 5a - 3a - 23 = 11 This simplifies to: 2a23=11 2a - 23 = 11

  3. Next, add 2323 to both sides: 2a23+23=11+23 2a - 23 + 23 = 11 + 23 This simplifies to: 2a=34 2a = 34

  4. Finally, divide both sides by 22: a=342=17 a = \frac{34}{2} = 17

4. Verify and Summarize

To verify, substitute a=17a = 17 back into the original equation:

  • Left side: 5(17)23=8523=625(17) - 23 = 85 - 23 = 62
  • Right side: 3(17)+11=51+11=623(17) + 11 = 51 + 11 = 62

Both sides are equal, confirming that our solution is correct.

Final Answer

The solution of the equation 5a23=3a+115a - 23 = 3a + 11 is a=17a = 17. Thus, the correct response is B 17.

This problem has been solved

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