what point is a solution of x+2y<4
(2, 4)(1, 1)(3, 5)(-1, 5)That is the solution of x+2y<4
subtract x2y<-x+4divide 2y<-x/2+4find line and shade down , including (0,0)any point there is a solution(1,1)(1,-1)(0,0)(-pi,pi)
