Решите систему уравнений: 3у-2х=10 ;  7х+5у=27

[latex]\left \{ {{3y-2x=10} \atop {7x+5y=27}} \right. \left \{ {{10.5y-7x=35} \atop {7x+5y=27}} \right. \left \{ {{15.5y=62} \atop {7x+5y=27}} \right. \left \{ {{y=4} \atop {7x+20=27}} \right. \left \{ {{y=4} \atop {7x=7}} \right. \left \{ {{y=4} \atop {x=1}} \right.[/latex]