Which of the following equations has infinite solution?
a. 5x + 2(4-x) = x - 2 + (10 + 2x)
b. 5x + 2(3x) = x - 2 + (4 + 2x)
c. 5x + 2(4- x) = 2x - 2 + (6 + x)
d. 5x + 2(5 - x) = x - 2 + (13 + 2x)​