Question

How do you solve `3=10+v`?

Answer 1

`v=-7`

Explanation:

Start with your equation: `3=10+v`.

You can subtract any value from one side provided that you subtract the same value from the other side. In order to isolate the `v`, we should subtract both sides by `10`.

So, `3-10=10+v-10.`

Simplify the left-hand side: `3-10=-7`. For the right-hand side, move `+v` to the left to get `+v+10-10`. The `10`'s cancel out to leave `v`.

We are left with `-7=v`. We can swap both sides of an equation to get `v=-7`.