whatsup8
whatsup8
08-07-2017
Mathematics
contestada
need help. this is hard.
Respuesta :
konrad509
konrad509
08-07-2017
[tex]\dfrac{x}{y}=\dfrac{13}{5}\\ x+y=90\\\\ 5x=13y\\ x=90-y\\\\ 5(90-y)=13y\\ 450-5y=13y\\ 18y=450\\ y=25\\\\ x=90-25\\ x=65[/tex]
It's 65 and 25.
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