Fernanda bought a 500-milliliter container juice. she used some of the juice and has 200 milliliters left. how much orange juice did she use?

She used 300 milliliters of orange juice. We know this because we subtract 200mL of orange juice from 500mL of orange juice.

500mL-200mL=300mL

Therefore she used 300mL of orange juice.

if you was gonna solve for a, a is a   < -12