[tex] \left \{ {{4x-y-24=2(5x-2y)} \atop {3y-2=4-(x-y)}} \right. [/tex]⇔[tex] \left \{ {{4x-y-24=10x-4y} \atop {3y-2=4+x+y}} \right. [/tex]⇔[tex] \left \{ {-6x+3y=24 |:3} \atop {-x=6-2y}} \right. [/tex]⇔[tex] \left \{ {{-2x+y=8} \atop {-x=6-2y}} \right. [/tex]
-2(6-2y)+y-8=-12+5y=8⇔5y=20⇒y=4
-x=6-2y⇔-x=6-8⇔x=2
