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

Step 1

Step-by-step explanation:

Associative property of addition  is  The order of the parentheses.  There are no parentheses is this problem.  We are using the commutative property of addition which states we can change the order of the addends

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)