[tex]a) \\\left \{ {{3x-2y=4 /*3} \atop {-9x+6y=10}} \right. \\+\left \{ {{9x-6y=12} \atop {-9x+6y=10}} \right. \\-6y+6y=12+10\\0\neq 22\\\text{Uklad sprzeczny}[/tex]
[tex]b) \\\left \{ {{7x+4y=-9 /*5} \atop {9x-5y=11 /*4}} \right. \\\left \{ {{35x+20y=-45} \atop {36x-20y=44}} \right. \\35x+36x=-45+44\\71x=-1 /:71\\x=-\frac1{71}\\\\7*(-\frac1{71})+4y=-9\\-\frac7{71}+4y=-9 /+\frac7{71}\\4y=-8\frac{71}{71}+\frac7{71}\\4y=-8\frac{64}{71} /*\frac14\\y=-\frac{632}{71}*\frac14\\y=-\frac{158}{71}\\\text{Uklad oznaczony}[/tex]
[tex]c) \\\left \{ {{-\frac34x+y=2 /*4} \atop {3x-4y=8}} \right. \\+\left \{ {{-3x+4y=8} \atop {3x-4y=8}} \right. \\-3x+3x+4y-4y=8+8\\0\neq 16\\\text{Uklad sprzeczny}[/tex]
[tex]d) \\\left \{ {{5x-\frac12y=7 /*(-2)} \atop {10x-2y=2}} \right. \\+\left \{ {{-10x+y=-14} \atop {10x-2y=2}} \right. \\y-2y=-14+2\\-y=-12\\y=12\\5x-\frac12*12=7\\5x-6=7 /+6\\5x=13 /:5\\x=\frac{13}5\\\text{Uklad oznaczony}[/tex]
[tex]e) \\\left \{ {{\frac23x-\frac73y=\frac53 /*(-6)} \atop {4x-14y=9}} \right. \\\\\left \{ {{-4x+14y=-10} \atop {4x-14y=9}} \right. \\-4x+4x+14y-14y=-10+9\\0\neq -1\\\text{Uklad sprzeczny}[/tex]
[tex]f)\\\text{Uciete zdjecie}[/tex]
