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$\left \{ {{3x-3y=2; |*2} \atop {-2x+4y=1;|*3}} \right. \ \textless \ =\ \textgreater \ +\left \{ {{6x-6y=4;} \atop {-6x+8y=3;}} \right. \ \textless \ =\ \textgreater \ \left \{ {{y=3 \frac{1}{2}; } \atop {x=4 \frac{1}{25}. }} \right. \\ 2y=7; =\ \textgreater \ y=3,5; \\ 6x-6*3,5=4; \\ 6x-21=4; \\ 6x=25; \\ x= \frac{25}{6}=4 \frac{1}{25}.$