7x-2y=0 3x+6y=24 найдите решение системы уравнений

[latex] \left \{ {{7x-2y=0} \atop {3x+6y=24}} \right. \left \{ {{2y=7x} \atop {3x+6y=24}} \right. \left \{ {{ y=3,5x}} \atop {3x+6*3,5x=24}} \right. \left \{ {{y=3,5x} \atop {3x+21x=24}} \right. [/latex] [latex] \left \{ {{y=3,5x} \atop {24x=24}} \right. \left \{ {{y=3,5} \atop {x=1}} \right. [/latex]