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Maths

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1.Solve the simultaneous equations:

5x + 4y = 13

3x + 8y = 5

  • Maths -

    Multiply * -2 (5x + 4y = 13)

    -10x - 8y = -26
    3x + 8y = 5

    -7x = - 21
    x = 3

    substitute x = 3 in one of the equations and solve for y

  • Maths -

    Where do you get the -2?

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