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12 November, 11:20

Two trains, Train A and Train B, weigh a total of 300 tons. Train A is heavier than Train B. The difference of their weights is 128 tons. What is the weight of each train?

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  1. 12 November, 11:37
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    Train A = 214

    Train B = 86

    Step-by-step explanation:

    a + b = 300

    a - b = 128

    a + b = 300

    a = 128 + b

    (128 + b) + b = 300

    128 + b + b = 300

    128 + 2b = 300

    2b = 300 - 128

    2b = 172

    b = 172 : 2

    b = 86

    a = 128 + b

    a = 128 + (86)

    a = 214
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