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Can you solve the maths puzzle by replace the question mark with the correct number ?
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The sum of two numbers is 86, and their difference is 20. find the two numbers
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Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.
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Three people are traveling and need to exchange the currency of their native country for the currency of the country they are visiting. drag each exchange to the category that shows the ratio of currencies in that exchange.
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Can you solve the maths puzzle by replace the question mark with the correct number ?...
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