Question

2x-9=-1 what's x in this question?

Answer 1

x = 4

Explanation:

So, the basic way that we solve a one variable equation is isolating the x variable on one side. We can see that we have a -9 on the left side, and a -1 on the right. Let's simplify this to isolate the x variable:

First, add 9 to both sides:

`2x-9=-1\\+9.........+9`

2x=8

Now, we can divide both sides by 2:

x = 4

Remember when doing these solving for x problems:

Whatever you do to one side, you have to do to the other

Answer 2

Answer: 4

Explanation:

1. We want to have x by itself, so we can isolate it by moving -9 to the other side of the equation.

2. This leaves us with 2x=-1+9

3. This equals 2x=8

4. Now we want to completely leave x by itself, so since we know that it is being multiplied by 2, we have to move it to the other side.

5. This leaves us with x=8/2

6. Finally, 8/2=4.

7. x=4.