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Use the properties of equality to solve the equation. 1 = u + 9
Depression
A psychiatric disorder characterized by a lasting feeling of depression or a disinterest in engaging in activities, significantly altering day-to-day life.
Seasonal Affective Disorder
A type of depression that occurs at a specific time of year, usually in the winter, when there is less natural sunlight.
Equator
An imaginary line that wraps around the center of the Earth, equidistant from the North and South Poles, dividing the Earth into Northern and Southern Hemispheres.
Daylight
The natural light received from the sun during the day.
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