You do not need to purchase the entire Homeschool Kit to get the solutions manual. It can be purchased separately here: Saxon Physics Solution Manual
The Saxon Physics Solutions Manual has step by step solutions to every Problem Set question.
However, it does not include solutions to the weekly tests. Saxon does not publish solutions to the weekly tests. However, they do publish an Answer Key, which includes answers to the tests. The answer key booklet is included in the Saxon Physics Homeschool Kit.
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