math homework

Anyone know any maths equivalent textbook of strive physics. Preferably something divided into different topics with questions from the past and definitely not Cambridge or the other common ones

How would I solve part a and b.

How would is solve a question like this.

So I'm doing linear equations at school and we have this question "Find the equation of the line that is parallel to y=5-x/2 and passes through (-1,6)" I found my answer using a different method and I'm not sure that if I were to use it in an exam, I would get full marks So the method I used...