7a + b - 9c + 17d
step-by-step explanation
(- 5)( a - 2b +3c - 4d ) - (-3)( 4a - 3b+2c - d )
- 5( a - 2b + 3c - 4d ) - (-3)( 4a - 3b + 2c - d)
Using Distributive property
- 5a + 10b - 15c + 20d + 12 a - 9b + 6c - 3d
Arranging like terms together
- 5a + 12a + 10b - 9b -15c + 6c + 20d -3d
7a + b - 9c + 17d
