Graph the linear inequality x<3

Dot or draw a small uncolored circle at 3 and straight line to the left or to negative infinity as shown in the number line below.

or if you mean in coordinate plane then just draw the straight horizon line (ellipsis) at x=3 and color from x=2 to negative infinite or to the left side as shown in the second image.

∞ this is your sign

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.