Answer:
5c + 2a - 12b - (2a + 6b-10c) =
2a - 2a -12b -6b + 5c -(-10c) =
0a - 18b +15c =
-18b + 15c
Step-by-step explanation:
you first merge the exercise
you place every letter by the similar one
you calculate; watch out - - = +
delete the zero's and write the remaining parts
