lisetteilozo
lisetteilozo lisetteilozo
  • 19-09-2018
  • Mathematics
contestada

Please help I don’t understand.

Please help I dont understand class=

Respuesta :

shindmand shindmand
  • 19-09-2018
a+b+c+d=0
a=a
b=a+2
c=a+2+2
d=a+2+2+2

a+a+2+a+4+a+6=0
4a+12=0
4a=-12
a=-3

b=-1
c= 1
d=3

Check:
-3-1+1+3
-4+4=0
0=0 correct
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