



 
Hi Shelly, What you need to do is manipulate the equation to end up with an equation of the form
When you manipulate the equation you need to make sure that the two sides remain equal. The operation that do this are to add the same amount to each side or multiply each side by the same amount. With your equation I would first multiply each side by 5. or
128 + 145 + 139 + 157 = 569 so I would next add 569 to each side. When you find x make sure that you verify that the average score on the 5 games is 148. Penny  


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