If x +  = 3, then evaluate 8x3.

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SSC CGL 2022 Tier-I Official Paper (Held On : 05 Dec 2022 Shift 4)
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  1. 212
  2. 216
  3. 180
  4. 196

Answer (Detailed Solution Below)

Option 3 : 180
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Detailed Solution

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Given:

x +  = 3

Concept Used:

Simple calculations is used

Calculations:

⇒ x +  = 3

On multiplying 2 on both sides, we get

⇒ 2x +  = 6  .................(1)

Now, On cubing both sides,

⇒ 

⇒ 

⇒ 

⇒ 

⇒   ..............from (1)

⇒ 

⇒ 

⇒ Hence, The value of the above equation is 180

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