Question

$solve \: this \:$
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Answer 1

Answer:

in short

Step-by-step explanation:

thus,the number -4 must be subtracted from 12,16,21 so thr resultant numbers are in continued proportion

Hope it helps u

Answer 2

Answer:

let the number be x

=> 12-x = 16-x

16-x 21-x

=> (16-x)^2 = (12-x)(21-x)

=> 16^2+x^2 -2×16x = 12×21 -12x- 21x +x^2

=> 256+x^2-32x = 252-33x +x^2

=> 33x -32x = 252-256 +x^2-x^2

=> x = -4 answer

Step-by-step explanation:

HOPE IT HELPS :-))