Which of the equations listed below are linear equations?

I think the answer is D.

If not juts look up a linear equation calculator and it will tell you.

Hope this helps :)

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.