Missing denominator

3 1/3 + 4/? =4 2/15
What is the missing number in the equation?

Correct answer:

x =  5

Step-by-step explanation:

a=331=3+31=33 3+1=39+1=310=3313.3333 b=4152=4+152=154 15+2=1560+2=1562=41524.1333  a + 4/x = b   a x + 4 = b x  x ( ab) = 4 x=ba4=15623104=5

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