যদি 3x+2 = 81 হয়,তবে 3x-2 = কত ?
A 1
B 3
C 2
D 4
Correct Answer: Option A
দেওয়া আছে,3x+2 = 81 ⇒ 3x+2 = 34 ⇒ x+2 = 4 ⇒ x = 2
এখন,3x-2 = 32-2 =30 = 1.
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