Answer:
-98x -54
Explanation:
- Open the parenthesis by multiplying each term of (6x +3 ) by (-18).
7x + 3x - 18(6x + 3) = 7x + 3x -18*6x - 18*3
= 7x + 3x - 108x - 54
- Combine like terms. Like terms have same variable with same power. 7x ; 3x and (-108x) are like terms. Combine the coefficient of the like terms. 7+3 = 10 & 10 -108 = -98.
= -98x - 54