Question

Given: x + y = 6.
If x ∈ {-15, -6, -1}, then which of the following sets of ordered pairs are solutions?
{(-15, -21), (-6, -12), (-1, -7)}
{(-15, 21), (-6, 12), (-1, 7)}
{(-15, 21), (-6, 12), (-1, -7)}

Answer 1

To solve this, you'll want to plug each element of the set into the equation as x and solve each for y. That will give you three pairs of x and y values.

Answer 2

rewrite the equation
y = 6 - x

substitiute x = -15 to find y = 6 - (-15) y = 21

then x = -6 to find another y

lastly x = - 1 to find the last y

this will give the solution set of ordered pairs

Answer 3

second one