Answer:
x=9
Step-by-step explanation:
Hi there!
We are given the following equation:
-3x + 9 = -18
We want to solve for x
To do that, we need to isolate x on one side; the value of x (the answer) will be on the other side.
We can manipulate numbers in order to help us isolate x on one side.
First, let's remove 9 from the left side; subtract 9 from both sides
-3x + 9 = -18
- 9 -9
___________________
-3x = -27
Now, there are no more numbers on the left side, but we aren't done yet. The value of x is also equal to the value of 1x.
In order to find the value of 1x, we can divide both sides by -3, as if you divide any number by itself, the result is 1. x doesn't get divided (there are no other numbers or variables to divide x by when we divide -3x by -3), so the result on the left side would be 1x, or x.
Therefore, we need to divide both sides by -3
-3x/-3 = -27/-3
x= 9
(the number is not negative because when you divide a negative by a negative, the resulting number is positive)
Hope this helps!
