Let x and y be the two unknown numbers. The first statement says that one number say x, is 6 more than twice another, say, y. If we express this mathematically, that would be:
x = 6 + 2y or that could be y = 6 + 2x
The second statement says that the sum of both numbers, x and y, is 51. That would be
x + y = 51
From the choices, the answer would be
B. y = 2x + 6 and x + y = 51
