Answered

Find the best answers to your questions at Westonci.ca, where experts and enthusiasts provide accurate, reliable information. Join our Q&A platform to connect with experts dedicated to providing precise answers to your questions in different areas. Our platform offers a seamless experience for finding reliable answers from a network of knowledgeable professionals.

1) 6x+7y=-9
-4x-5y=5

Sagot :

deathstrike001
-5y=4x+5
y=-4/5(x)-1

6x+7y=-9
6x+7(-4x/5-1)=-9
6x-28x/5-7=-9
2/5(x)=-2
multiply both sides by 5
2x=-10
x=-5

6x+7y=-9
-30+7y=-9
7y=21
Y=3
[tex]\begin{cases} 6x+7y=-9 \\ -4x-5y=5 \end{cases}\\ \\\begin{cases} 6x =-7y-9 /:6\\ -4x-5y=5 \end{cases}\\ \\\begin{cases} x =-\frac{7}{6}y-\frac{9}{6}\\ -4x-5y=5 \end{cases}\\ \\\begin{cases} x =-\frac{7}{6}y-\frac{3}{2}\\ -4*(-\frac{7}{6}y-\frac{3}{2})-5y=5 \end{cases}[/tex]

[tex]\begin{cases} x =-\frac{7}{6}y-\frac{3}{2}\\ \frac{14}{3}y+6-5y=5 \end{cases} \\ \\\begin{cases} x =-\frac{7}{6}y-\frac{3}{2}\\ \frac{14}{3}y-\frac{15}{3}y=5-6 \end{cases} \\ \\\begin{cases} x =-\frac{7}{6}y-\frac{3}{2}\\ -\frac{1}{3}y=-1/(-3) \end{cases}[/tex]

[tex]\begin{cases} x =-\frac{7}{6}*3-\frac{3}{2}\\ y=3 \end{cases} \\ \\\begin{cases} x =-\frac{7}{2}-\frac{3}{2}\\ y=3 \end{cases}\\ \\\begin{cases} x =-\frac{10}{2}\\ y=3 \end{cases} \\ \\\begin{cases} x =-5\\ y=3 \end{cases}[/tex]


Thanks for stopping by. We are committed to providing the best answers for all your questions. See you again soon. We hope you found this helpful. Feel free to come back anytime for more accurate answers and updated information. Keep exploring Westonci.ca for more insightful answers to your questions. We're here to help.