Question

add a + b - c,- a + b + c, -2 a + 3 - 4 c​

Answer 1

Answer:

2b-3c+3

Step-by-step explanation:

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

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

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

(0)+(2b)+(-3c)+3

2b-3c+3