Answer:
Step-by-step explanation:
After removing one black marble:
x = -7 - 17/20 or -157/20
2x/3 - 3.2 = -8.1
2x - 9.6 = -24.3
20x - 96 = -243
20x = -157
x = -157/20
x = -7 - 17/20
6/5 or 1 and 1/5 lbs.
The total cost of the meal will be $17.64.
42
Do the math:)