To solve for x in an inequality is very similar to solving for x in an equation since for both you would need to isolate x.
step 1) -2x-4>8 add the 4 over to move any constants over to the +4 +4 other side. -2x> 12
step 2) x< -6 Divide out the -2 to isolate x, however, keep in mind, when you divide or multiply over any negative number, you must also remember to flip the inquality sign.
-2x - 4 > 8 Add 4 to both sides of the inequality sign -2x > 12 Divide both sides by -2 (When you divide by a negative on an inequality, you need to flip the inequality sign as well.) x < -6
the lateral area, or just the area of the sides, well, the sides are really just 4 triangles, so just get the area of each, and sum them up, that's the lateral area