[tex]\displaystyle\bf\\+\left \{ {{7x+3y=43} \atop {4x-3y=67}} \right. \\---------\\11x=110\\\\x=110:11=10\\\\3y=43-7x=43-7\cdot 10=43-70=-27\\\\y=-27:3=-9\\\\\\Otvet \ : \ (10 \ ; \ -9)[/tex]