If you have a graphing calculator one way to know you are right is put the left side in Y1 and the right side in Y2 then hit 2nd trace and intersection then find the intersection and the X value is your answer. If you don't have a graphing calculator then I'm sorry
Ok here is a graph
Hope this helps and don’t forget to mark as brainliest if you thought it was most helpful :)
Your answer would be c and d because coefficients are the numbers that go in front of the variables. Have a nice day I hope this helped :)