Answer:

Step-by-step explanation:
We are given the two functions:

And we want to find:

So, by substitution, we acquire:

Distribute:

Simplify:

Answer:
1 is the 4th answer
2 is 1.875
Step-by-step explanation:
1/2*3 3/4=1.875
Answer:
3w+7=9
Step-by-step explanation:
i need at least 20 characters so I just rote this
13 ESSA É A RESPOSTA CORRETA DA SUA PERGUNTA.
Answer:
7.5 or 15/2 (Whatever form you need to use)
Step-by-step explanation:
N-5 divided by 2 =5
Combine like terms:
-5 divided by 2= -2.5.
N-2.5=5
Add -2.5 from itself, then do the same to the other side:
N-2.5=5
+2.5=+2.5 (Adding 2.5 to -2.5 cancels it out)
N=7.5