Iam stuck on this question! will give brainliest for the first ! allot of !

miracle solved the following equation:

3 + 2x + 7 = –3x – 9

step
work
justification

1
2x + 3 + 7 = –3x – 9
associative property of addition

2
2x + 10 = –3x – 9
combine like terms

3
5x + 10 = –9
addition property of equality

4
5x = –19
subtraction property of equality

5
x = –3.8
division property of equality

which step has an incorrect justification?

step 4

step 3

step 2

step 1