Question

please tell me answer
that's important​

Answer 1

Answer:

19) 45 will be the ans.

20) -81 will be the ans.

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hope it help you.

Answer 2

Answer:

Q19

Sol.

5/12×9/10

5/12×10/10 and 9/10×12/12

50/120×108/120

5400/120

=>45

Q20

Sol.

3+x=-78

-78-3=-81

3+(-81)=78

the number is -81