How did thutmose 3 lose his power as pharaoh?

Queen Hatshepsut usurped most of his reign.

Explanation:

Stepmother of Tuthmosis III. queen Hatepshut was the real ruler of Egypt at the time of the said pharaoh. She was actually the real ruler, while Pharaoh “remained in the shadows.” With the usurpation of the Egyptian throne, Hatshepsut ruled for almost twenty years. Thutmosis III. was thus the real ruler of Egypt for only two years.

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69