Question 905115
x+y=200,
0.4*x+0.5*y=0.45*200
0.4*x+0.5*y=90
x=200-y
0.4*(200-y)+0.5*y=90
80-0.4y+0.5*y=90
0.1*y=10
y=100 at 50%
x=200-y
x=100 at 40%
check
0.4*100+0.5*100=0.45*200
40+50=90
90=90
ok