Question

What is v?
-15V-40 = 23-8V

Answer 1

V = -9

Explanation:

First, you get rid of the variable on one side of the equation. In this case, you'd pick -15V or -8V to add, because they're negative, to either side.

-15V - 40 = 23 -8V

+8V + 8V

The -8V and +8V cancel out, so you're left with -7V - 40 = 23.

Next, you'd add 40 to both sides to get rid of that number and leave yourself with a variable on one side and a regular number on the other side.

-7V - 40 = 23

+ 40 +40

You'll end up, after this step, at -7V = 63.

Finally, you divide both sides by -7 to get the variable alone.

-7V = 63

/-7 /-7

Now, you have what the variable is equal to.

V = -9

Answer 2

V = -9

Explanation:

-15V - 40 = 23 - 8V

The objective is to get V alone. To do this, first subtract -15V from both sides. Since -15V is a negative, subtracting it will be adding a positive.

-40 = 23 + 7V

Now that there is only one term with the variable V, subtract 23 from both sides.

-63 = 7V

Finally, divide both sides by 7 to get V completely isolated.

-9 = V.

The final answer is V = -9.