Respuesta :

Answer:

7a - b + 7c

Explanation:

To write the expression in a standard form, we need to eliminate the parenthesis:

(5a +3b - 6c)+ (2a - 4b + 13c) ​

5a + 3b - 6c + 2a - 4b + 13c

Then, identify the like terms and add them:

5a + 2a + 3b - 4b - 6c + 13c

(5a + 2a) + (3b - 4b) +(- 6c + 13c)

7a - b + 7c

Therefore, the standard form is:

7a - b + 7c