A few days ago

Anonymous

x+2y=9 and 3x+2y=7?

heyy someone help me with thisss..you have to solve by elimination

Top 3 Answers

A few days ago

kid

Favorite Answer

x+2y=9

-3x-2y=-7 (subtract the bottom equation so u can eliminate the 2y)

-2x=2 (this is wut u get after elimination)

x=-1 (plug this back into either equation)

x+2y=9

-1+2y=9

2y=10

y=5

A few days ago

jeremy

next time be specific.

is this an elimination by addition or by substitution?

x+2y=9

x=9-2y <--- tada! the value of x 3(9-2y)+2y=7 -- after substitution, then use distribution 27-6y+2y=7 27-4y=7 -4y=7-27 -4y=-20 y=-20/-4 y=5

A few days ago

(3x+2y)-(x+2y)=7-9

3x-x=7-9

2x=7-9

2x=-2

x=-2/2

9- -1=2y

10=2y

Investigatory Project Idea?

what does skirmish mean during the civil war times?

cover letter???

Pls suggest a name??

bio homework questions. help!?

Find the average speed for the given distance and time.?

an idea for a paper…?