To solve the equation \( 14 = 7 \times 9 + 4x \) for \( x \):
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First, calculate \( 7 \times 9 \): \[ 7 \times 9 = 63 \]
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Substitute that back into the equation: \[ 14 = 63 + 4x \]
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Now, isolate \( 4x \) by subtracting 63 from both sides: \[ 14 - 63 = 4x \] \[ -49 = 4x \]
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Next, solve for \( x \) by dividing both sides by 4: \[ x = \frac{-49}{4} \]
The equation has defined a value for \( x \), which is \( \frac{-49}{4} \).
Now let's check which of the choices indicates the undefined value for \( x \):
- \( x \neq 94 \)
- \( x \neq \frac{9}{4} \)
- \( x \neq -94 \)
- \( x \neq \frac{-9}{4} \)
- \( x \neq -49 \)
- \( x \neq \frac{-4}{9} \)
- \( x \neq 0 \)
None of these provide an undefined expression related to the derived value of \( x = \frac{-49}{4} \).
Generally, undefined values in equations occur when a division by zero occurs. In this case, however, none of the responses indicate a division by zero or other mathematical condition that negates \( x \).
Hence, if you were looking for valid conditions to avoid, the correct answer is \( x \neq \frac{-49}{4} \). As none of the options match, the correct selection essentially should signify avoiding the derived solution rather than presenting an undefined state or a condition that leads to a problem within the context of the presented equation.
If the answer should reflect the calculated state: If considering the answer in terms of avoidance of undefined values specifically focused on divisions and restrictions applied to \( x \), the responses provided do not contain issues indicating \( x = \frac{-49}{4} \) as undefined within communal limits.
To summarize: If just considering how to avoid specific results, \( x \neq \frac{-49}{4} \) should be reflected there if desired mention of value relating to equality displays required marking upon fulfillments directly answering the query accordingly towards clarity via placement structure defined within real-number arc.