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henrychavez2015 henrychavez2015
  • 26-01-2015
  • Mathematics
Answered

If the point (a,3) lies on the graph of the equation 5x + y = 8, then a=

A1
B-1
C7

Verified Answer :

naǫ
naǫ naǫ
  • 26-01-2015

\((a,3) \\ x=a \\ y=3 \\ \Downarrow \hbox{plug the values into the equation} \\ 5a+3=8 \ \ \ |-3 \\ 5a=5 \ \ \ |\div 5 \\ \boxed{a=1} \Leftarrow A\)

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konrad509
konrad509 konrad509
  • 26-01-2015

\(5a+3=8\\ 5a=5\\ a=1\Rightarrow A\)

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