rocio finished 21 pages of a book in 3 days. monday she finished half of what she did on tuesday and wednesday she finished twice as much as she did on tuesday. how much did she read each day?

Answer 1

Finished X-Pages on Tue.
Finished X/2 Pages on Mon.
Finished 2X-Pages on Wed.

X + X/2 + 2x = 21 Pages.
7x/2 = 21.
Multiply both sides by 2:
7x = 42
X = 6 Pages.
X/2 = 6/2 = 3 Pages.
2x = 2*6 = 12 Pages.