Question 1195156
.


A TWIN problem to it was solved at this forum by me two or three weeks ago under this link


<A HREF=https://www.algebra.com/algebra/homework/sets-and-operations/sets-and-operations.faq.question.1194891.html>https://www.algebra.com/algebra/homework/sets-and-operations/sets-and-operations.faq.question.1194891.html</A>


https://www.algebra.com/algebra/homework/sets-and-operations/sets-and-operations.faq.question.1194891.html