For nitrogen to be a liquid, its temperature must be within 12.78 °F of –333.22 °F. The equation |x + 333.22 | = 12.78 can be used to find x, which represents the maximum and minimum temperatures at which nitrogen is a liquid.
To be within 12.78 of -333.22 you have to add and subtract 12.78 from -333.22.
(-333.22 + 12.78 =-320.44 => maximum temperature)
(-333.22 - 12.78 =346 => minimum temperature)