Answered

At Westonci.ca, we provide clear, reliable answers to all your questions. Join our vibrant community and get the solutions you need. Explore a wealth of knowledge from professionals across different disciplines on our comprehensive platform. 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 using our platform. We're always here to provide accurate and up-to-date answers to all your queries. We hope you found what you were looking for. Feel free to revisit us for more answers and updated information. We're here to help at Westonci.ca. Keep visiting for the best answers to your questions.