Giải hệ phương trình: \(\left\{ \begin{array}{l}5x - y = 30\\3x + y = 26\end{array} \right..\)
A.\(\left( {x;y} \right) = \left( {7;5} \right).\)
B.\(\left( {x;y} \right) = \left( {3;5} \right).\)
C.\(\left( {x;y} \right) = \left( {7;3} \right).\)
D.\(\left( {x;y} \right) = \left( {5;3} \right).\)
A.\(\left( {x;y} \right) = \left( {7;5} \right).\)
B.\(\left( {x;y} \right) = \left( {3;5} \right).\)
C.\(\left( {x;y} \right) = \left( {7;3} \right).\)
D.\(\left( {x;y} \right) = \left( {5;3} \right).\)
Loga
Hóa Học lớp 12
