Question

The maximum size of a text message is 160 characters. A space counts as one character.

Write an equation that represents the number of remaining (unused) characters in a text message as you type. Let x represent the number of typed characters and r represent the number of remaining characters.

Answer 1

`\boxed{r = 160 \: – \: x}`

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Where r = # remaining characters, and x = # typed characters.