Say he needs to mow 'x' no of lawns to go on trip,
<u>So money he will get by mowing lawn</u>
=$20x
which is the amount of money he needs
(=$125)
But he already has $45.
So,
$125-$45=$80 is the amount of money he will require just to go trip.
i.e. ,
➧20x ⩽80
which is the required inequality.
<u>Divide both sides by 20,</u>
<h3>➧x⩽4</h3>
<u>which means he needs to mow </u><u>4</u><u> lawns to go on trip.</u>