Description: Learn how to solve one-step addition and subtraction equations that have fractions and decimals in them. Let's give ourselves some practice solving equations. So let's say we had the equation 1/3 plus A is equal to 5/3. So there's a bunch of different ways of doing this, and this is one of the fun things about equations is there's no exactly one right way to do it.*Teacher Advisor is 100% free.