Question

what should be added to 15/21 to make it 13/84 .full method
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Answer 1

Answer:

so

15/12 + x = 13/84

x = 13/84 × 12/15 (by transversal)

x = 156/180 (diveded by three)

x = 52/60 (diveded by two)

x = 26/30 (diveded by two)

x = 13/10

so, 13/10 should be added to 15/21 to make it 13/84.

Answer 2

Answer:

-47/84

Step-by-step explanation:

Let x be the no which is to be added

A. T. Q

15

$\frac{15}{21} + x = \frac{13}{84} \\ x = \frac{13}{84} - \frac{15}{21} \\ taking \: lcm \\ x = \frac{13 - 60}{84} \\ x = \frac{ - 47}{84}$