Answer:
The last line of the justification is 1.2 = 0.6n
Step-by-step explanation:
Let's find an answer step by step so we can observe the last line of justification.
Let's start by the original equation:
1.4n + 2 = 2n + 3.2
By adding (-1.4n) and (-2) to both sides we obtain:
1.4n - 1.4n + 2 -2 = 2n - 1.4n + 3.2 - 2
which can be simplified as:
0 = 0.6n + 1.2
Adding (-1.2) to both sides we obtain:
0 - 1.2 = 0.6n + 1.2 - 1.2
which can be simplified as:
-1.2 = 0.6n, which is the last line of the justification.
Now by dividing in both sides by 0.6, we solve the equation:
-1.2/0.6 = 0.6n/0.6
which give us the solution: -2 = n.
