-12x-0.4>7.3x+16-55
= -12x-7.3x>16-55+0.4
= -19.3x> -38.6
= x< -38.6/-19.3
= x< 2
You are doing an experiment in science and you need to add exactly 250 mL to a beaker. But the markings on the container have rubbed off from so much use. But you have a ruler. By figuring out the volume of the cylinder, you can figure out where the 250 mL line is. :)