Question 1130413
let number be {{{x}}}

if one less than five  times a number: {{{5x-1}}}

if that is fewer than twenty four:{{{5x-1<24}}}

now, you can find that number

{{{5x-1<24}}}

{{{5x<24+1}}}

{{{5x<25}}}

{{{x<5}}}

so, {{{5x-1<24}}} will be true for all numbers less than {{{5}}}

interval solution:

({{{-infinity}}},{{{5}}})