Question 916686
x = score as a percentage on last test



(85% + 70% + x)/3 = 80%


85% + 70% + x = 3*80%


85% + 70% + x = 240%


155% + x = 240%


x = 240% - 155%


x = <font size=5 color="red">85%</font>



He needs a <font size=5 color="red">85%</font> on the last test.



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Thanks,


Jim