pinkslimer1708 pinkslimer1708 18-12-2020 Mathematics contestada 1. -2b+9-(-5b) 2.y+12-(5y)-(3y) 3.0.3z -13-4z+6.7 4.-5.2+8.2-7.8 5.-9c-(-2)-(12c)-(5) please show work