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
