Question

the equation 7x - 3y = 42 relates to x and y. find three pairs of points (x,y) that make the equation true.

Answer 1

If it doesn't matter whether the points are integers or not you can just pick a number for either y or x and solve for the other variable. For example, if you pick 3 to be your x, plug it in and then solve for y. Start out with:
`7x-3y=42` Plug in 3 for x:
`7(3)-3y=42`. Then,
`21-3y=42`. Subtract 21 from both sides and then divide by -3 on both sides. You end up with y=-7 so one of your points is (3, -7)