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How do you write y-10=2 (x-8) in standard form

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units