Answer:
12x+3
Explanation:
distribute the 5 to both the 2x and -1
10x-5
do the same with the the 2. Distribute the 2 to the x and to the 4.
2x+8
10x-5+2x+8
add like terms: the 10x and the 2x are like terms and the -5 and 8 are like terms
12x+3 : the answer