Really Need Help in Math!!

Dd12 is going into 7th grade this year. For 6th grade we have used Systematic Mathematics and while she has learned alot, it has been a struggle. The main problem is that there is no solutions manual so alot of time when she gets stuck I can’t even figure it out. (math is not my strong point and I never learned the way he teaches) The other thing is that she has grown very tired of the videos. Paul does move at a very slow pace. She likes that it is a mastery program and prefers that to a spiral where she is working on several things at once. I have looked at Math-U-See several times but honestly with all the extras you have to buy, I just can’t afford it. I also worry how easy the transition would be for her going in so late in the game. According to the placement test she would start in Zeta. What are my other options? I am tired of switching around and so is she. i want something she can stick to. Any advice or help would be greatly appreciated!