Respuesta :

2a +2c= 5a - 5b

collect light terms.

take 2a on the other side

2c = 5a -2a-5b

2c = 3a - 5b

divide 2c's 2 on both sides

and

c = (3a - 5b)/2

give a brainliest please. tnx have a nice day.