3x+4=3×9x হলে x = কত?

A 2

B 3

C 4

D 9

Solution

Correct Answer: Option B

এখানে,
3x+4=3×9x 
⇒ 3x+4= 3×32x
⇒ 3x+4= 31+2x
⇒ x+4 = 1+2x
⇒ 2x-x=4--1
x=3

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