Question

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Answer 1

5×13=65

a×13=91

a=91/13

a=7

12×13=b

b=156

Answer 2

x=ky. k is a constant

x=5,y=65, then k=13

x=?,y=91,. y=13k. x=13k=91. ,

x=7.

x=12 ,y=(12)(13)=156