Question 56244
Plug in (-3,4) to each equation.
1. {{{ 5x+7y=b }}}
{{{ 5(-3) + 7(4) = b }}}
{{{ -15 + 28 = b }}}
{{{ 13 = b }}} 


2. {{{ mx+y=22 }}}
{{{ m(-3) + 4 = 22 }}}
{{{ -3m = 18 }}}
{{{ m = -6 }}}