Pairs of solutions to the equation 6x - 5y = 120

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?