Solve the system of equations below by the substitution method. 
Definitions:
Shogunate
The Japanese military government of the 12th through 19th centuries.
Kei School
A prominent school of Japanese sculpture, particularly known for its Buddhist statues, flourishing in the Kamakura period.
Artistic Tradition
The passing down of style, themes, practices, and techniques among artists and art movements across generations.
Sculpture
A three-dimensional art form created by shaping or combining hard materials, traditionally stone or metal, but can include any material.
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