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10 February, 18:56

What is the product of 1.5 and 2.8 is 4.2?

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  1. 10 February, 21:03
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    2.8 x + 1.5 = 4.2 (x - 10)

    2.8 x + 1.5 = 4.2 (x - 10)

    28 x/10 + 15/10 = 42/10 (x - 10)

    28 x + 15 = 42 (x - 10)

    28 x + 15 = 42x - 420

    14 x - 405 = 0

    x = 31.07
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