# How do you solve 3=10+v?

Apr 23, 2017

$v = - 7$

#### 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 $v = - 7$.