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16.10.2020 •
Mathematics
A certain star is 2.1x10^2 light years from the Earth. One light year is about 5.9x10^12 miles. How far from the earth (in miles) is the star?
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Ответ:
Value of x = 5
Step-by-step explanation:
Given:
x + 4 = 3(x - 2)
Find:
Value of x
Computation:
x + 4 = 3(x - 2)
⇒ x + 4 = 3x - 6
⇒ x = 3x -6 - 4
⇒ x - 3x = -10
⇒-2x = - 10
⇒ x = -10 / - 2
Value of x = 5