algebraic equation and inaqualities

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in a triangle XYZ,the measure of angle Y is 40 more than the measure of angle X.the measure of angle Z is 10 less than three times the measure of angle X.find the measure of angle X

  • algebraic equation and inaqualities -

    Y = X+40
    Z = 3X-10

    X+Y+Z = 180
    X + X+40 + 3X-10 = 180
    5X = 150
    X = 30

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