Question

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

Step-by-step explanation:

(x/3)+(x/5)+(x/15)=3

(x/3)+(3x+x)/15=3

(x/3)+4x/15=3

(5x+4x)/15=3

9x=45

x=5

Answer 2

Step-by-step explanation:

$\frac{x}{3} \: + \frac{x}{5} + \frac{x}{15} = 3 \\ \\ = > \: \frac{ 5x + 3x + x }{15} = 3 \\ \\ = > \: 9x \: = 15 \times 3 \\ \\ = > \: x = \frac{45}{9} \\ \\ = > x \: = 5$

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