Question

Calculate the solution of the system.

y = 1500x - 100

y = 1200x + 800

Answer 1

Do you want to solve it the linear algebra way or by substitution?

Answer 2

substitution

Answer 3

Don't have the time to actually write it, but will tell you how to. You have 2 equations which both equals y, as in y = y, so 1500x -100 = 1200x +800. now you can solve for x. When you have x you can substitute those values in in one of the equations.