Answer:
-2x + 22y + 24z + 15
Step-by-step explanation:
-4*(5x-3y+10) + 6*(3x+7z+8) +2/3 * (15y-27z+21/2)
Expand all the brackets and you would get:
-20x + 12y - 40 + 18x + 42z + 48 + 10y - 18z + 7
= (-20x + 18x) +(12y + 10y) + (42z - 18z) - 40 + 48 + 7
= -2x + 22y + 24z + 15
Hope this helped :3
