Answer:
-23
Step-by-step explanation:
2x - 37 =
2(7) - 37 =
14 - 37 =
-23
Lets say you have a question such as 7x+1=15.
First you have to start with the addition or subtraction because of PEMDAS. In order to get rid of the +1, you have to subtract 1 from it and do the same thing to the number on the other side of the equal sign.
7x+1-1=15-1
Which leaves you with
7x=14
What you want to do is get the variable by itself so, since the variable is basically multiplying itself by the coefficient, you want to divide the 7x by 7 to get rid of the coefficient. Make sure to do the same for both sides of the equation!
7x/7=14/7
x=2
Thats the answer.
Hopefully you can figure this out on your own problem.
The temperature after 7 hours is -2° F
<em><u>Explanation</u></em>
At 3 p.m the temperature was 12° F
Then , the temperature began to drop 2° F every hour.
So, the total temperature dropped in 7 hours will be: 
° F
Now, for finding the temperature after 7 hours, we need to <u>subtract the "temperature dropped" from the "initial temperature"</u>.
Thus, the temperature after 7 hours 
° F
Answer:
Step-by-step explanation:
Before, we had b bones. Now, we have four more, so .
