filou222 filou222

23-11-2014
Mathematics

Answered

Substitution methode:

5x-3y=-11

x-2y=2

Verified Answer :

23-11-2014

\(\begin{cases} 5x-3y=-11 \\ x-2y=2 \end{cases}\\\\\begin{cases} 5x-3y=-11 \\ x =2y+2 \end{cases}\\\\Substitution \\5(2y+2) -3y=-11 \\10y+10-3y=-11\)

\(7y=-11-10\\7y=-21\ \ / :7\\y=-3\\\\x =2*(-3)+2=-6+2=-4\\\\Answer: \ \ \begin{cases}x=-4 \\y=-3 \end{cases}\)

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