Question 1203744
as you can see from the graph, we have {{{dashed}}} line and shaded area is all to the {{{left}}}

so, we need equation of that line and we can find it using {{{2}}} points on it


points are:

({{{0}}},{{{7}}})  and ({{{4}}},{{{-5}}})


then a slope is

 {{{m=(-5-7)/(4-0)}}}

{{{m=-12/4}}}

{{{m=-3}}}


equation of a line with given slope and point is


{{{y-y1=m(x-x1)}}}

substitute {{{m=-3}}} , {{{y1=7}}}, and {{{x1=0}}}

{{{y-7=-3(x-0)}}}

{{{y=-3x+7}}}


since this line is not part of solution (because is dashed), inequality will be


{{{y<-3x+7}}}

or in standard form

{{{3x+y<7}}}


<a href="https://ibb.co/WcRFsJ9"><img src="https://i.ibb.co/WcRFsJ9/Capture.jpg" alt="Capture" border="0"></a>