I have tried solving all three and my answers are not correct. So, how do you solve the elasticity of demand?

For the following demand equation compute the elasticity of demand and determine whether the demand is elastic, unitary, or inelastic at the indicated price. 3 x=(?)p+19;p= 12 m = x the demand is y For the following demand equation compute the elasticity of demand and determine whether the demand is elastic, unitary, or inelastic at the indicated price. (Round your answer to three decimal places.) p = 150 - x"; p = 27 E(27) = ---Select--- vFor the following demand equation compute the elasticity of demand and determine whether the demand is elastic, unitary, or inelastic at the indicated price. 0.2x+p10=o;p=5 5(5) =