Решите систему (x+2y) (3x-y)=40 (x+2y) (4x+y)=98

(x+2y) (3x-y)=40 (x+2y) (4x+y)=98 (x+2y)=40/ (3x-y) (40/ (3x-y) (4x+y)=98 x+2y=40/ (3x-y) (160x+40y) / (3x-y)=98 x+2y=40/ (3x-y) 160x+40y=98*(3x-y) x+2y=40/ (3x-y) 160x+40y=294x-98y x+2y=40/ (3x-y) 134x-138y=0 x+2y=40/ (3x-y) 67x-69y=0 x+2y=40/ (3x-y) x=69y/67Решим ур-е.: 69y/67+2y=40/ (207y/67 -y) (69y+134y) /67=40/ (207y-67y) /67) 203y/67=40*(67/140y) 203y/67=2680/140y203y/67=268/14y203y/67=134/7y1421y^2=8978…