Система уравнения 4х+у=-10 ниже под ним log3 (3у-х)=2

[latex]\left \{ {{4x + y = -10} \atop {log_3(3y-x) = 2}} \right.[/latex] [latex]\left \{ {{4x + y = -10} \atop {3y - x = 3^2}} \right.[/latex] [latex]\left \{ {{x = 3y - 9} \atop {l12y - 36 + y = -10}} \right.[/latex] [latex]\left \{ {{x = 3y - 9} \atop {l13y = 26}} \right.[/latex] [latex]\left \{ {{y = 2} \atop {x = -3}} \right.[/latex]  

4x+y=-10 log₃(3y-x)=2   y=-10-4x 3²=3y-x   9=3(-10-4x)-x 9=-30-12x-x -13x=39 x=-3   y=-10-4*(-3) y=-10+12 y=2