Answer
$4x-3=29$
Work Step by Step
"Less than" tells us we are going to subtract. In the absence of commas "3 less than" tells us to subtract 3 from whatever follows.
"4 times a number" means to multiply a number by 4, which can be written as 4x.
"Gives" tells us to put an equal sign between the expressions before and after the word "gives".
