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first, what is x?
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22 added to 378 equals 400.
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Heat energy must be added to or subtracted from a substance to cause a phase change.
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first, what is x?
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22 added to 378 equals 400.
The denominator (bottom number) must be the same for all the fractions being added or subtracted together.
Weber's law states that the just noticeable difference between two stimuli is proportional to the magnitude of the stimuli. In other words, the change in stimulus needed to detect a difference is a constant ratio of the original stimulus level.
Unlike fractions have denominators that are unequal, and therefore cannot be added or subtracted. If two fractions need to be added or subtracted they must first be converted to like fractions.
If the number, x, has 10 subtracted from twice it to make 28, then x must be 19. 2x - 10 = 28 2x = 38 x = 19