Mrs.Smith Went School Shopping And Bought A Shirt . She Also Bought A Pair Of Pants For $36.12 . She Spent $50.82 Altogether . Write An Equation To Find Out The Cost Of Her Shirt .

First, you know the unknown, that is the cost of the shirt. We will let x represent the cost of the shirt. Now, we need an equation that contains the unknown and the other pieces of information. Mrs. Smith spent 50.82 on the shirt and pants. So, x, the cost of the shirt, plus 36.12, the cost of the pants, has to come to 50.82.

x + 36.12 = 50.82.

To solve for x, we must put x by itself on one side of the equation. But, we see that x is not alone. We have to subtract 36.12 from both sides of the equation to isolate x.

x = 50.82 - 36.12 = 14.70

And there you have it.