设甲种原价为X元,则乙种原价为400-X元
X*1.4*0.7+(400-X)*1.4*0.9=399
0.98X+504-1.26X=399
0.98X-1.26X=399-504
2.8X=105
X=37.5
400-37.5=362.5
37.5*1.4=52.5
362.5*1.4=507.5
甲乙原来定价为52.5和507.5
设甲种原价为X元,则乙种原价为400-X元
X*1.4*0.7+(400-X)*1.4*0.9=399
0.98X+504-1.26X=399
0.98X-1.26X=399-504
2.8X=105
X=37.5
400-37.5=362.5
37.5*1.4=52.5
362.5*1.4=507.5
甲乙原来定价为52.5和507.5