What is the solution to the equation? 0.5x + 6.1 = 2x − 5.9

x=10.1x is equal to 10 point 1

x=4.8x is equal to 4 point 8

x=8x is equal to 8

x=−8x is equal to negative 8

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ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

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