(10c + 8b + 6) - 8×(c - b + 1)= 10c + 8b + 6 - 8c + 8b - 8= 2c + 16b - 2
(xy + yz + xy + 10) + (8xy + 2yz + 5xz)= 2xy + yz + 8xy + 2yz + 5xz + 10= 10xy + 3yz + 5xz + 10
(0.5a + 0.2b) - 2×(2a - 8b)= 0.5a + 0.2b - 4a + 16b= -3.5a + 16.2b
-(2a + 3b + 4c) - (a + 10c)= -2a - 3b - 4c - a - 10c= -3a - 3b - 14c
(10c + 8b + 6) - 8×(c - b + 1)
= 10c + 8b + 6 - 8c + 8b - 8
= 2c + 16b - 2
(xy + yz + xy + 10) + (8xy + 2yz + 5xz)
= 2xy + yz + 8xy + 2yz + 5xz + 10
= 10xy + 3yz + 5xz + 10
(0.5a + 0.2b) - 2×(2a - 8b)
= 0.5a + 0.2b - 4a + 16b
= -3.5a + 16.2b
-(2a + 3b + 4c) - (a + 10c)
= -2a - 3b - 4c - a - 10c
= -3a - 3b - 14c