Carolyn was asked to solve the following system of equations. Her work is shown. Problem:
3x - 2y = 7
y = x + 2
Carolyn's Work:
3x - 2(x+2) = 7
3x - 2x + 4 = 7
x + 4 = 7
X = 3
y = x + 2
y = 3 + 2
y = 5
(3,5)
What error did Carolyn make?
O A. Carolyn did not subtract 4 from both sides of the equation.
O B. Carolyn did not substitute 3 for x to find the value of y for the solution.
O C. Carolyn did not distribute the -2 to both terms.
O D. Carolyn did not substitute x + 2 for y.