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Anna [14]
3 years ago
11

8 is to 64 as 2 is to x

Mathematics
2 answers:
alina1380 [7]3 years ago
4 0
X is 4 because 64 is 8 squared, so 4 would be 2 squared
ololo11 [35]3 years ago
3 0
X is equal to 4 because 8 times 8 is equal to 64 so 2 times 2 is equal to 4
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1/16^3x=64^2(x+8)<br> Solve for x.
SSSSS [86.1K]

Answer:

x = -4

Step-by-step explanation:

16 = 4*4 = 4²

64 = 4 * 4* 4 = 4³

(\dfrac{1}{16})^{3x}=64^{2*(x+8)}\\\\\\(16^{-1})^{3x}=64^{2x + 16}\\\\\\16^{-3x}=64^{2x +16}\\\\(4^{2})^{-3x}=(4^{3})^{2x+16}\\\\4^{-6x}=4^{6x +48}

As bases are same, compare exponents

6x + 48 = -6x  

Subtract 48 from both sides

6x = -6x - 48

Add '6x' to both sides

6x + 6x = -48

12x = -48

Divide both sides by 12

x = -48/12

x = -4

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