Graph lines as if the inequalities were equal signs.
X = -3 is a vertical line at x = -3, because it's less than we shade to the left. All numbers less than -3 are to the left. The line is dashed because there is no equal to. Only less than. The line is not included in the solution set.
y = -x - 1 is a line with a y-intercept of -1 and a slope of -1. All values that are less that y are below the line. Because it's less than or equal to the line is solid.
first, you multiply both sides by 2; 77+x=168 then you subtract 77 from both sides; x=91 then you plug it back in to check; (77+91)/2=84 ; 168/2=84 ; 84=84
