Answered

Get personalized answers to your unique questions on IDNLearn.com. Discover in-depth and trustworthy answers from our extensive network of knowledgeable professionals.

how do i solve -2x+8y=-8, 5x+8y=20 using elimination

Sagot :

Ameliaswanidn
let me know if you have any questions
View image Ameliaswan

Answer:

-2x+8y=-8...........(1)

5x+8y=20

5x=20-8y

x=(20-8y)/5.........(2)

Step-by-step explanation:

putting the value of x in equation (1)

-2(20-8y)/5+8 y=-8

(-40+16 y )/5=-8-8y

-40+16 y=(-8-8y)×5

-40+16 y=-40-40y

40y+16y=40+40

56y=80

y=80/56=20/14=10/7

again

putting the value of y in equation (2)

x=(20-8×10/7)/5=(20-80/7)/5=(140-80)/7×1/5=60/35=12/7

Thank you for using this platform to share and learn. Keep asking and answering. We appreciate every contribution you make. Your search for solutions ends here at IDNLearn.com. Thank you for visiting, and come back soon for more helpful information.