Question

поможіть пж срочно дам 70 баловвваааааааа​

Answer 1

$\displaystyle\bf\\\left \{ {{\dfrac{8x-5}{2} -\dfrac{2y-1,5}{3} =4} \atop {\dfrac{2x+1}{2} +\dfrac{3y-4}{5} =3,5}} \right. \\\\\\\left \{ {{\dfrac{8x-5}{2} \cdot 6-\dfrac{2y-1,5}{3}\cdot 6 =4\cdot 6} \atop {\dfrac{2x+1}{2} \cdot 10+\dfrac{3y-4}{5}\cdot 10 =3,5\cdot 10}} \right. \\\\\\\left \{ {{(8x-5)\cdot 3-(2y-1,5)\cdot 2=24} \atop {(2x+1)\cdot 5+(3y-4)\cdot 2=35}} \right. \\\\\\\left \{ {{24x-15-4y+3=24} \atop {10x+5+6y-8=35}} \right. \\\\\\\left \{ {{24x-4y=36} \atop {10x+6y=38}} \right.$

$\displaystyle\bf\\\left \{ {{6x-y=9 \ |\cdot 3} \atop {5x+3y=19}} \right. \\\\\\+\left \{ {{18x-3y=27} \atop {5x+3y=19}} \right. \\----------\\23x=46\\\\x=46:23=2\\\\y=6x-9=6\cdot 2-9=12-9=3\\\\\\Otvet \ : \ (2 \ ; \ 3)$