An equation that represents a given situation is 39+x=64.
The given statement is last week Sally had thirty-nine dollars. She washed cars over the weekend and now has sixty-four dollars.
We need to write an equation that represents a given situation.
In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
Let the money earned by Sally over the weekend be x.
Now, 39+x=64
Therefore, an equation that represents a given situation is 39+x=64.
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