Answer:
-x + 15y + 7a - b + 7c - 23
Step-by-step explanation:
3(x+5y-4) - 4x - 11 + 5a + 3b - 6c + 2a - 4b + 13c
= 3x + 15y -12 - 4x - 11 + 5a + 3b - 6c + 2a - 4b + 13c
= (3x-4x) + 15y + (5a+2a) + (3b-4b) - (6c - 13c) - (11+12)
= -x + 15y + 7a - b + 7c - 23
Feel free to mark this as brainliest! :D
