Odpowiedź:
[tex]\begin{cases}4(x-1)-2(y-0,5)=7\\3(x-2)+5(y-1,5)=13,5\end{cases}\\\\\\\begin{cases}4x-4-2y+1=7\\3x-6+5y-7,5=13,5\end{cases}\\\\\\\begin{cases}4x-3-2y=7\\3x-13,5+5y=13,5\end{cases}\\\\\\\begin{cases}4x-2y=7+3\\3x+5y=13,5+13,5\end{cases}\\\\\\\begin{cases}4x-2y=10\ \ /:2\\3x+5y=27\end{cases}\\\\\\\begin{cases}2x-y=5\\3x+5y=27\end{cases}\\\\\\\begin{cases}-y=5-2x\ \ /\cdot(-1)\\3x+5y=27\end{cases}\\\\\\\begin{cases}y=-5+2x\\3x+5y=27\end{cases}[/tex]
[tex]3x+5(-5+2x)=27\\\\3x-25+10x=27\\\\13x=27+25\\\\13x=52\ \ /:13\\\\x=4\\\\\\y=-5+2\cdot4=-5+8=3\\\\\begin{cases}x=4\\y=3\end{cases}[/tex]
