“The treasure covered in dust and webs waited beneath the stairs, safely hidden under the mildewing books and tattered old newspapers” how many adverbial phrases are included in that sentence?

lets g

➕❎➕➕➖➗❌✖✔❗❗❗❗❗❗i dont understend you

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4