Respuesta :

midnightoreo
you have to make proportions put the percentages over 100 then divide by 4
AL2006
-- Remember how to find an average:
           -- Add up all the items on the list.
           -- Divide the sum by the number of items on the list.

-- John's first 3 test scores were 94, 98, and 98 .

-- His score on the 4th test will be 'F' .

-- His average after the fourth test will be

                                   (94 + 98 + 98 + F) / 4 .

-- He wants that average to be 96. 

                             96  =  (94 + 98 + 98 + F) / 4

There's your equation.

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