So you have many ordered pairs here that look like (x , y)
So you take each one, for example (84,12) and plug it into that equation you have
y=7x
(84 , 12) means (x = 84, y = 12 ) so we plug those in
12=7(84)
Does that come out true? if it doe...we have a solution..if not...obviously not :)
