QUESTION IMAGE
Question
c. \\(\frac{1}{2}x = 50 - \frac{3}{4}x\\)
<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
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"Combining Like Terms"
],
"new_concepts": [],
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</pre_analysis>
<reasoning>
Write down the equation
\[
\frac{1}{2}x = 50 - \frac{3}{4}x
\]
Add 3/4x to both sides
\[
\frac{1}{2}x + \frac{3}{4}x = 50
\]
\[
\frac{2}{4}x + \frac{3}{4}x = 50
\]
\[
\frac{5}{4}x = 50
\]
Multiply both sides by 4/5
\[
x = 50 \cdot \frac{4}{5}
\]
\[
x = 10 \cdot 4
\]
\[
x = 40
\]
</reasoning>
<answer>
\(x = 40\)
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Algebra",
"Multi-Step Equations"
]
}
</post_analysis>
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<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Multi-Step Equations",
"Combining Like Terms"
],
"new_concepts": [],
"current_concepts": [
"Multi-Step Equations",
"Combining Like Terms"
]
}
</pre_analysis>
<reasoning>
Write down the equation
\[
\frac{1}{2}x = 50 - \frac{3}{4}x
\]
Add 3/4x to both sides
\[
\frac{1}{2}x + \frac{3}{4}x = 50
\]
\[
\frac{2}{4}x + \frac{3}{4}x = 50
\]
\[
\frac{5}{4}x = 50
\]
Multiply both sides by 4/5
\[
x = 50 \cdot \frac{4}{5}
\]
\[
x = 10 \cdot 4
\]
\[
x = 40
\]
</reasoning>
<answer>
\(x = 40\)
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Algebra",
"Multi-Step Equations"
]
}
</post_analysis>