Patrice has worked a certain amount of hours so far this week. Tomorrow she will work four more hours to finish out the week along with a total of 10 hours. How many hours has she worked so far?
Let x = the amount of hours worked so far this week. Thus, the equation is x + 4 = 10. To solve this equation, subtract 4 from both sides of the equation; x + 4 - 4 = 10 - 4. The variable is now alone: x = 6.