Question

40 БАЛЛОВ ДАЮ ПОМОГИТЕЕЕЕЕ

Answer 1

ответ:

$v = 18,75\\x = 15$

$\displaystyle \left \{ {{\frac{x+v}{15}-\frac{x-v}{3}=1 } \atop {\frac{2x-v}{6}-\frac{3x+2v}{3}=-25 }} \right. \\\\\left \{ {{x=-\frac{15}{4}+\frac{3}{2}v } \atop {\frac{2x-v}{6}-\frac{3x+2v}{3}=-25 }} \right. \\\\\frac{2(-\frac{15}{4}+\frac{3}{2}v)-v }{6}-\frac{3(-\frac{15}{4}+\frac{3}{2}v)+2v }{3}=-25\\\\v=15\\\\x=-\frac{15}{4}+\frac{3}{2}*15\\ \\x=\frac{75}{4}=18,75 \\(v,x)=(15; 18,75)$