Решить систему: 36,5x+98y=3,4, 40x+80y=3,3;

36,5x+98y=3,4,
40x+80y=3,3; ⇒40х=-80у+3,3⇒х=-2у+33/400
36 1/2*(-2у+33/400)+98у=3 2/5
-73у+2409/800+98у=17/5
25у=17/5-2409/800=2720/800-2409/800=311/800
у=311/800:25=311/2000
х=-2*311/2000+33/400=-622/2000+165/2000=457/2000