Verified answer

combine the a terms: a + a = 2a

combine the b terms: -4b - 2b = -6b

combine the c terms: 3c - c = 2c

put it together:

2a - 6b + 2c

that's it! ;)

a + 3c - 4b - c + a - 2b

= (a+a) +(3c- c ) - ( 4b +2b )

= 2a + 2c -6b

= 2( a- 3b+ c)

a + a = 2a

3c - c = 2c

-4b - 2b = - 6b

SO...

2a + 2c - 6b

2a+2c-6b You're welcome ^_^