Реши систему уравнений 5х+6y=-20 9y+2x=25

[latex]\left \{ {{5x+6y=-20 |-2} \atop {9y+2x=25|5}} \right. [/latex] [latex]\left \{ {{-10x-12y=40} \atop {45y+10x=125}} \right. [/latex] [latex]\left \{ {{-10x-12y=40} \atop {33y=165}} \right. [/latex] [latex]\left \{ {{-10x-12*5=40} \atop {y=5}} \right. [/latex] [latex]\left \{ {{-10x=100} \atop {y=5}} \right. [/latex] [latex]\left \{ {{x=-10} \atop {y=5}} \right. [/latex]