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tigerlily88 tigerlily88
  • 24-03-2014
  • Mathematics
Answered

Solve by Elimination.
x + 2y = 7
3x - 2y = -3

Verified Answer :

Anonymous Anonymous
  • 24-03-2014

\(+\left\{\begin{array}{ccc}x+2y=7\\3x-2y=-3\end{array}\right\\---------\\x+3x=7+(-3)\\4x=4\ \ \ \ /:4\\x=1\\\\\left\{\begin{array}{ccc}x=1\\x+2y=7\end{array}\right\\\left\{\begin{array}{ccc}x=1\\1+2y=7&/-1\end{array}\right\\\left\{\begin{array}{ccc}x=1\\2y=6&/:2\end{array}\right\\\left\{\begin{array}{ccc}x=1\\y=3\end{array}\right\\\)

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