Triangle a b c is shown with its exterior angles. angle b a c is (p + 4) degrees and angle a c b is 84 degrees. exterior angle x b c is (3 p minus 6 degrees).
what is the measure of ∠xbc?

m∠xbc = m∠bac + m∠bca
3p – 6 = p + 4 + 84
3p – 6 = p + 88
2p – 6 = 88
2p = 94