aiirrx
aiirrx aiirrx
  • 21-08-2017
  • Mathematics
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[HELP PLEASE ALGEBRA]

Would the answer only be B?

HELP PLEASE ALGEBRA Would the answer only be B class=

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caylus
caylus caylus
  • 21-08-2017
Hello,

|x+4|=3x-5
if x+4>=0 then
          |x+4|=x+4
          x+4=3x-5
          2x=9
            x=9/2
else
    x+4<0 : x<-4
    |x+4|=-(x+4)
     -(x+4)=3x-5
    -x-4=3x-5
    4x=1
    x=1/4 : to exclude since x<-4
end if


Only one solution : x=9/2
ANSWER B.
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