AQA Statistics 1 4.09 Inverse Norm Example 3 (TI-82 STATS)

[gjtysop]

when you subtracted both equations you did it wrong, 1.6448 - 1.7507 is not 3.3956 but -0.105

[marihahz]

Hi Sir, thanks for the vid, without the calculator method I keep getting the same simultaneous equations but I get -0.6449 and 0.7507 for my z values?