Question

Someone please i need help

Answer 1

Sam didn't make a mistake
set a answers:
1. 8x-6x+1= 11
2x+1=11
2x=10
x=5
2. -4x-6+x=-12
-3x -6=-12
-3x= -18
x=6
3 could not find answer

set b answers
4 -2(2x+3)+3x=-2
-4x-6+3x=-2
x=4

5 could not answer

6 2x-8+8x=12
10x-8=12
10x=20
x=2