Question 171362
Since we have the ordered pair (-9,5), this means that we're testing the equation using the values {{{x=-9}}} and {{{y=5}}}



{{{-x + 3y = 24}}} Start with the given equation



{{{-(-9) + 3(5) = 24}}} Plug in {{{x=-9}}} and {{{y=5}}}



{{{9 + 3(5) = 24}}} Rewrite {{{-(-9)}}} as {{{9}}}



{{{9 + 15 = 24}}} Multiply



{{{24 = 24}}} Add. Since the equation is true, this verifies that (-9,5) is a solution of the equation {{{-x + 3y = 24}}}