beatriz233 beatriz233

12-12-2018
Mathematics

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12-12-2018

Let's go:

[tex]\frac{42}{6x - 1} = \frac{78}{10x + 5} \\\\ 42.(10x + 5) = 78.(6x - 1) \\\ 420x + 210 = 468x - 78 \\\ 468x - 420x = 210 + 78 \\\ 48x = 288 \\\ x = 6[/tex]

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