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Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers
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The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years
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Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?
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I just want to give away points again...
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