Sumali sa IDNStudy.com at makuha ang mabilis at kaugnay na mga sagot. Magtanong ng anumang bagay at makatanggap ng kumpleto at eksaktong sagot mula sa aming komunidad ng mga propesyonal.

2x+3y=12 and 4x-3y=6
how to answer it on system equation solved by graphings 
the answer in equation two equation not the graph



Sagot :

[tex]\begin{cases} 2x+3y=12\ \ | \ multiply\ both\ sides\ by\ (-2 ) \\ 4x-3y=6 \end{cases} \\\\ \begin{cases} -4x-6y=-24 \\ 4x-3y=6 \end{cases}\\ + -------\\-9y=-18\ \ | \ divide \ both \ sides\ by\ (-9)\\\\\frac{-9}{-9}y=\frac{-18}{-2} \\y=2 [/tex]

[tex]2x+ 3\cdot 2=12\\\\2x+6=12 \ \ |\ subtract\ 6\ to\ both\ sides \\ 2x+6-6=12-6\\2x=6 \ \ | \ divide \ both \ sides\ by\ 2 \\x=\frac{6}{2} \\x=3 \\\\Answer : \ \begin{cases} x=3 \\y=2 \end{cases} [/tex]