Respuesta :

under 2 answer is 6 under 7 answer is 9 and above 12 answer is 13
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a the first unknown  , b the second unknown , and c the third 

2/ a  = 4/6  = 7 / b  = c/12

1)    2/a = 4/ 6
a= 6x2 /4  = 12/4 = 3

2)      4/6= 7/b  

b=7*6/4  =10.5  


3) 4/6= c/12

c= 12*4/6= 8 



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