(3x+8)+x> 3x-12 can someone tell me how to solve it because already know the answer which is x> -20

Write two subtraction equations that are equivalent to 5 + 12 = 17.

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2