HP 33s hp 33s_user's manual_English_E_HDPM20PIE56.pdf - Page 104

a 6 q  ) Changes cubic millimeters to liters (but doesn't change V). Using XEQ for Evaluation If an equation is displayed in the equation list, you can press X to evaluate the equation. The entire equation is evaluated, regardless of the type of equation. The result is returned to the X-register. Example: Evaluating an Equation with XEQ. Use the results from the previous example to find out how much the volume of the pipe changes if the diameter is changed to 35.5 millimeters. Keys: Display: Description: |H X g 35.5 g g a 6 q Displays the desired equation. #@ Starts evaluating the equation to  88)  find its value. Prompts for all variables. @ Keeps the same V, prompts for D. )  @ Stores new D, Prompts for L.  8 )  .8 )  Keeps the same L; calculates the value of the equation - the imbalance between the left and right sides. . )  Changes cubic millimeters to liters. The value of the equation is the old volume (from V) minus the new volume (calculated using the new D value) - so the old volume is smaller by the amount shown. Responding to Equation Prompts When you evaluate an equation, you're prompted for a value for each variable that's needed. The prompt gives the variable name and its current value, such as %@) . „ To leave the number unchanged, just press g. 6-12 Entering and Evaluating Equations