Question 452074
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You really need another set of parentheses to avoid ambiguity.  I can't really tell whether you mean:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ (15\ -\ 7\ =\ 22)\ or\ (4\ +\ 9\ =\ 13\ and\ 9\ -\ 8\ =\ 1)]


Or


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ ((15\ -\ 7\ =\ 22)\ or\ (4\ +\ 9\ =\ 13))\ and\ (9\ -\ 8\ =\ 1)]


Although it turns out that it doesn't matter in this situation.


15 minus 7 is 8, not 22 so that one is false.  But 4 plus 9 is 13, so true and 9 minus 8 is 1 so also true.  Hence you either have:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \text{False or (True and True)}]


Which, in the aggregate is True


Or you have


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \text{(False or True) and True}]


Which is also true in the aggregate.


Actually, statements using numbers are easier because the truth of the statement is more objective.  Even saying something like "The grass is green" is subject to interpretation -- what kind of grass?  Are you in Phoenix in the middle of summer?  But with numbers, 2 + 2 = 4 is true and 2 + 2 = 5 is false always and forever.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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