Mathematics
If 5x + 1 = 25x - 2; find the value of :
3x - 3 × 23 - x.
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Answer
Given,
⇒ 5x + 1 = 25x - 2
⇒ 5x + 1 = (52)x - 2
⇒ 5x + 1 = 52(x - 2)
⇒ x + 1 = 2(x - 2)
⇒ x + 1 = 2x - 4
⇒ 2x - x = 1 + 4
⇒ x = 5.
Substituting value of x in 3x - 3 × 23 - x, we get :
⇒ 3x - 3 × 23 - x = 35 - 3 × 23 - 5
= 32 × 2(-2)
= .
Hence, 3x - 3 × 23 - x = .
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