Littlefire1990
Answered

Discover answers to your questions with Westonci.ca, the leading Q&A platform that connects you with knowledgeable experts. Connect with a community of professionals ready to help you find accurate solutions to your questions quickly and efficiently. Get detailed and accurate answers to your questions from a dedicated community of experts on our Q&A platform.

Could someone please tell me how to do elimination and substitution method.
Please show examples and fully explain how you did it.
Thank you :)

Sagot :

apologiabiology
so elimination
lets say
x+y=10
x+2y=15
if we make the first equation negative and add it to the second we get
-x+x-y+2y=-10+15 or
(x cancels out)
y=5

subsitution

x+3y=7
y=x+1
subsitute y=x+1 for y in the first equation
x+3(x+1)=7
distribute
x+3x+3=7
group like terms
4x+3=7
subtract 3 from both sides
4x=4
divide both sides by 4
x=1
subsitute x=1 into second equation (y=x+1)
y=(1)+1
y=2
Thank you for choosing our platform. We're dedicated to providing the best answers for all your questions. Visit us again. Thanks for using our platform. We aim to provide accurate and up-to-date answers to all your queries. Come back soon. Get the answers you need at Westonci.ca. Stay informed by returning for our latest expert advice.