Dominic has $15 for dinner. his meal costs $13.90. he wants to leave an 18% tip. does he have enough money? explain your reasoning

This question could be paraphrased:  Is $13.90 plus an 18% tip still less than $15?

Is $13.90 + 0.18($13.90) less than $15?

That comes to $16.40.    No, Dom doesn't have enough money.

How much could he afford to spend on a meal if there were still to be an 18% tip?

1.18x = $15, or    x = $15/1.18 = $12.71.

Ithink it's the first one ( let me know if it right)