lockers 1, 4, 9, 16, 25, 40, and 49 are open
i ran through it by the other answer is wrong
2(2x + 3) = -4 + 2(2x + 5)
4x + 6 = -4 + 4x + 10
4x + 6 = 4x + 6
4x - 6 + 6 = 4x - 6 + 6
4x = 4x
x = x
unlimited solutions.