Question

what should be added 1/12 to get (9/10+13/20)?

Answer 1

Answer:

x=22/15

Step-by-step explanation:

Let the number to be added be x

So,1/12+x=(9/10+13/20)

⇒1/12+x=9/10*2+13/20

⇒1/12+x=18/20+13/20

⇒1/12+x=31/20

⇒x=31/20-1/12(lcm of 20 and 12 is 60)

⇒x=3(31/20)-5(1/12)

⇒x= 93-5

         60

⇒x=88/60

⇒x=22/15

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