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19 lines
No EOL
251 B
Markdown
19 lines
No EOL
251 B
Markdown
$$
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\frac{x}{3} - 20 = \frac{x}{7}
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$$
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$$
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7x - 420 = 3x
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$$
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$$
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4x - 420 = 0
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$$
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$$
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4x = 420
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$$
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$$
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x = 105
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$$
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$$
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\frac{x}{5} + \frac{x}{3} + \frac{2x}{9} + \frac{x}{6} = \frac{18x}{90} + \frac{30x}{90} + \frac{20x}{90} + \frac{15x}{90} = \frac{83x}{90}
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$$ |