if <A and <B form a linear pair, and m<A=x-21 degrees, and m<B =x+15 degrees, then find x

Question

if <A and <B form a linear pair, and m<A=x-21 degrees, and m<B =x+15 degrees, then find x

Answer 1

if they're supplemental angles, they sum to 180 = x-21 +x+15 = 2x-6

2x = 186

x = 93

A = 93-21 = 72

B = 93+15 = 108

if they are complemtary angles, they sum to 90 = x-21 +x+15= 2x-6

2x= 96

x=48

A=27

B =63