Question #311230

E. Graphical Method; 1. 2x-3y=7;3x+y=5 2. 2x-5y=9;3x+4y=25


1
Expert's answer
2022-03-16T17:49:46-0400

1.{2x3y=73x+y=52x3y=7x25y113x+y=5x21y121.\\ \left\{ \begin{matrix}2x-3y=7\\ 3x+y=5\end{matrix}\right.\\ 2x-3y=7\\ \begin{matrix} x &2 &5 \\ y & -1&1 \end{matrix}\\ 3x+y=5\\ \begin{matrix} x &2 &1 \\ y & -1&2 \end{matrix}\\


(2,1)(2,-1)

2.{2x5y=93x+4y=252x5y=9x23y133x+4y=25x73y142.\\ \left\{ \begin{matrix}2x-5y=9\\ 3x+4y=25\end{matrix}\right.\\ 2x-5y=9\\ \begin{matrix} x &2 &-3 \\ y & -1&-3 \end{matrix}\\ 3x+4y=25\\ \begin{matrix} x &7 &3 \\ y & 1&4 \end{matrix}\\




(7,1)(7,1)


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