Question

One number is 6 more than twice another. If their sum is 51, find the numbers. Which of the following systems of equations represents the word problem?

A. y = 2x + 6 and y = x + 51
B. = 2x + 6 and x + y = 51
C. y = 2(x + 6) and x + y = 51

Answer 1

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