How can i put parentheses in 25 ÷ 5 - 4 = 25

Two lines that do not intersect are skew. always sometimes or never

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.

Why is x= 4 a solution to the proportion 14/x 56/1 6