Jawabanmu

2014-09-02T16:55:54+07:00
5-3p = -7
-3p = -12
p = 4

x disubtitusi pake -3
jadinya 5+(-3p) = -7 => 5-3p = -7

2014-09-02T16:57:06+07:00
5+px=-7
5+p(-3)=-7
5-3p=-7
-3p=-7-5
-3p=-12
p=4