Jawabanmu

2014-06-18T20:58:33+07:00
X;y;z=7:4:9
z-y=45
9p-4p=45
5p=45
p=9
x=7xp=63
y=4xp=36
z=9xp=81
63+36+81=180
2014-06-18T21:01:11+07:00
180
perbandingannya dimisalkan jadi 7x:4x:9x, jadi 9x-4x = 45, x= 9
x+y+z = 7x+4x+9x
          = 63 +36 + 81 = 180