It helps align the problem right. There is nothing to multiply there, so you have put a 0 or you'll get confused on what to do next.
C is not equivalent and #2 is -32a+40b-16
I think that would be q-15?
5x+3x=90+30
8x=120
(1/8) (8x) = (1/8) (120)
x=15
m<JAH= 3(15)=45
m<HAG= 5(15)=75
and the first one is
<KAE and <EAF are adjacent angles whose measurements are equal to
<KAF; <KAF and <JAG are vertical angles and are of equal measurement.