Question 120872
{{{5x + 7y = b}}}
{{{mx + y = 22}}}


Just substitute the values from the ordered pair given and solve:

{{{5(-3)+7(4)=b}}}
{{{-15+28=b}}}
{{{b=13}}}


{{{m(-3) + 4 = 22}}}
{{{m(-3) = 18}}}
{{{m=18/-6}}}
{{{m=-3}}}