ПОМОГИТЕ ПОЖАЛУЙСТА РЕШИТЬ ЭТИ ДВЕ СИСТЕМЫ УРАВНЕНИЙ

[tex] \frac{x}{3} - \frac{y}{4} = 6 \\ \frac{4x}{5} - \frac{3y}{4} = 6 \\ \\ \\ 8x + 3y = 1 \\ 2x - 4y = - 18[/tex]


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