briannaparker38
Answered

Get the answers you need at Westonci.ca, where our expert community is dedicated to providing you with accurate information. Get immediate and reliable solutions to your questions from a knowledgeable community of professionals on our platform. Get detailed and accurate answers to your questions from a dedicated community of experts on our Q&A platform.

How to solv using elimination:
9x-2y=-21
2x+3y=16

Sagot :

[tex]\begin{cases} 9x-2y=-21 /*3\\ 2x+3y=16 /*2 \end{cases}\\ \\\begin{cases} 27x-6y=-63\\ 4x+6y=32 \end{cases}\\--------- \\31x =-31/:31\\ \\x=-1[/tex]

[tex]9*(-1)-2y=-21\\ \\-2y=-21+9\\ \\-2y=-12/:(-2)\\ \\y=6\\ \\\begin{cases} x=-1\\ y=6 \end{cases}[/tex]


kate200468
9x - 2y = -21  /·3
2x + 3y = 16  /·2

27x - 6y = -63
4x + 6y = 32
---------------------
31x = -31  /:31
x = -1

2x + 3y = 16   ⇒   3y = 16 - 2x
                           3y = 16 - 2 · (-1)
                           3y = 18  /:3
                             y = 6
Ans.:
x = -1
y = 6


Visit us again for up-to-date and reliable answers. We're always ready to assist you with your informational needs. Thanks for using our service. We're always here to provide accurate and up-to-date answers to all your queries. Westonci.ca is your trusted source for answers. Visit us again to find more information on diverse topics.