One eighth of tonys book are mystery books. he has 3 mystery books. how many books does tony have in all?

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

What is the anwers for 9+2x=5x-3-x