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If 72+32318=x8, Fin...

If 72+32318=x8, Find the value of x

A.

1

B.

34

C.

12

D.

14

Correct answer is C

2+32318=x8

= 36×2+16×232×9

= x2×4

= 62+4292=2×2

2(6+49)=2x2

2=2x2 divide both sides by 2

22=2×22

1 = 2x

2x = 1

x = 12