Homework Help: math

Posted by theresa on Tuesday, January 15, 2013 at 6:08pm.

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?

math - Henry, Thursday, January 17, 2013 at 9:36pm
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.

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