50y+30x
2x-3y=5
4x+2y=7
x+3y≥4
y≥0
x+y=2
x≥2021
2x+y≤3
3x-4y≤7
10x-5y=2
x+y≥5
3x+2y=10
100x+400y
x≥0
x+y
y≥2020
2x+5y
