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How do I make a the subject of these equations?

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4a + 3b = 27

5a - 2b = 28

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  1. 4a + 3b = 27

    Subtracting 3b from each side:

    4a = 27 - 3b

    Dividing by 4:

    a = (27 - 3b) / 4.

    5a - 2b = 28

    Adding 2b to each side:

    5a = 2b + 28

    Dividing by 5:

    a = (2b + 28) / 5.

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