Consider the following set of equations:

Equation M: y = x + 4
Equation P: y = 3x + 6

Which of the following is a step that can be used to find the solution to the set of equations? (4 points)


A. x = 3x + 6

B. x + 4 = 3x + 6

C. x + 6 = 3x + 4

D. x = 3x