Respuesta :
Answer:
Step-by-step explanation:
We are given
[tex]X + Y = 47\\and\\Y = X + 9\\\\use \: substitution\\X + (X + 9) = 47[/tex]
Answer:
Step-by-step explanation:
We are given
[tex]X + Y = 47\\and\\Y = X + 9\\\\use \: substitution\\X + (X + 9) = 47[/tex]