Question 1105175
4D+5W=7.05
3D+8W=8.90
-12D-15W=-21.15, multiplying by -3
12D+32W=35.60, multiplying by 4
17W=14.45, adding
W=$0.85
substitute into first to get D
4D+4.25=7.05
4D=2.80
D=$0.70
Check in second
2.10+6.80=8.90
white-$0.85; dark $0.70.