If 1/x + 1/3х = 5, what is the value of 3x/4

Mathematics

1 answer:

marusya05 [52]2 years ago

6 0

Answer:

Step-by-step explanation:

$\frac{1}{x}+\frac{1}{3x}=5\\\\\frac{1*3}{x*3}+\frac{1}{3x}=5\\\\\frac{3}{3x}+\frac{1}{3x}=5\\\\\frac{4}{3x}=5\\\\4=5*3x\\\\4=15x\\\\\frac{4}{15}=x$

x = 4/15

$\frac{3}{4}x=\frac{3}{4}*\frac{4}{15}\\\\=\frac{1}{5}$

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