Answered

Welcome to Westonci.ca, the Q&A platform where your questions are met with detailed answers from experienced experts. Explore our Q&A platform to find reliable answers from a wide range of experts in different fields. Get detailed and accurate answers to your questions from a dedicated community of experts on our Q&A platform.

-2x-y=-9
5x-2y=18
substitution

Sagot :

naǫ
[tex]-2x-y=-9 \\ 5x-2y=18 \\ \\ \hbox{solve the first equation for y:} \\ -2x-y=-9 \ \ \ |+2x \\ -y=-9+2x \ \ \ |\times (-1) \\ y=9-2x \\ \\ \hbox{substitute 9-2x for y in the second equation:} \\ 5x-2(9-2x)=18 \\ 5x-18+4x=18 \\ 9x-18=18 \ \ \ |\div 9 \\ x-2=2 \ \ \ |+2 \\ x=4 \\ \\ y=9-2x=9-2 \times 4=9-8=1 \\ \\ \boxed{(x,y)=(4,1)}[/tex]
-2x-y = -9 5x-2y=18 -solve for y in terms of x -y= 2x-9 y=-2x+9 substitute 5x-2 ( -2x+9)=18 5x+4x -18=18 9x-18=18 9x= 36 x=4 substitute for x -2 (4) -y= -9 -8 -y = -9 -y = -1 y= 1 ANSWER x= 4 y=1 hope this helps
We appreciate your time on our site. Don't hesitate to return whenever you have more questions or need further clarification. Thank you for your visit. We're dedicated to helping you find the information you need, whenever you need it. Westonci.ca is committed to providing accurate answers. Come back soon for more trustworthy information.