Six times a number is two hundred and 40 what is the number

two hundred and 40 = 240

let "a number" = x

6(x) = 240

Isolate the x. Note the equal sign, what you do to one side, you do to the other. Divide 6 from both sides

(6x)/6 = (240)/6

x = 240/6

x = 40

40 is your number

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the correct is answer is a 9-sided polygon!