Let's analyze the equation \(8x - 3y = 2x + 9y\) and the statements provided.
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Constants vs. Coefficients:
- In the equation, \(8\), \(-3\), \(2\), and \(9\) are coefficients of the variables \(x\) and \(y\).
- Coefficients are the numerical factors that multiply the variables, while constants are standalone numbers not multiplied by any variable.
- Thus, statements referencing them as constants are incorrect.
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Factors of \(8x\):
- The term \(8x\) has \(8\) as its coefficient, and we could say that \(8\) is a factor of \(8x\) because \(8x = 8 \cdot x\).
- However, the statement "8 is the only factor of \(8x\)" would be misleading because other factors also exist for \(8x\), such as \(4 \cdot 2 \cdot x\). Hence, this statement is incorrect.
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Number of Variables:
- In the equation, there are two variables: \(x\) and \(y\). Thus, the statement claiming there are four variables is incorrect.
Based on this analysis, the correct response is:
8, −3, 2, and 9 are coefficients.