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Mice21 [21]
3 years ago
5

If 15% of 4x is 20 less than x, what is the value of x?

Mathematics
1 answer:
Bess [88]3 years ago
4 0

The sentence "15% of 4x is 20 less than x"

translates to    0.15 • (4x)  = x – 20

Solving that…

    0.15(4x) = x - 20           multiplipy 0.15•4

          0.6x = x - 20           subtract x from both sides

         -0.4x = - 20              divide both sides by -0.4

                x = 50

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Answer:

-0.9, -0.85, -3/4, -1/2, 1/4, 0.55

Step-by-step explanation:

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Answer:

  see below

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  1. 125^3 = (5^3)^3 = 5^(3·3) = 5^9
  2. 81^7 = (9^2)^7 = 9^(2·7) = 9^14
  3. (1/64)^3 = ((1/4)^3)^3 = (1/4)^(3·3) = (1/4)^9
  4. (1/64)^3 = ((1/2)^6)^3 = (1/2)^(6·3) = (1/2)^18
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