Let's solve your inequality step-by-step. −x−3<13+3x Step 1: Simplify both sides of the inequality. −x−3<3x+13 Step 2: Subtract 3x from both sides. −x−3−3x<3x+13−3x −4x−3<13 Step 3: Add 3 to both sides. −4x−3+3<13+3 −4x<16 Step 4: Divide both sides by -4. −4x −4 < 16 −4 x>−4