Question

Given the system mc023-1.jpg, which is true?

Answer 1

system of 3 equations, basically you see how the bottom 2 equations have -x. you can add them together to cancel that out, Then you need to do some rearranging to eliminate another variable using one of the bottom 2 and the top equation

Answer 2

What you are doing is breaking down the equation so that you get it in terms of 2 variables, so you can solve for them, basically after elimination you will be substituting

Answer 3

how many solutions will it have?

Answer 4

well, work it out