Ask your own question, for FREE!
Mathematics 8 Online
OpenStudy (anonymous):

Find x + y: -3x + 7y = -16 -9x + 5y = 16

OpenStudy (jackellyn):

Solve for y in the first eqn y=(-16 +3x)/7 Substitute into second eqn -9x+5((-16+3x)/7)=16 Distribute the 5 -9x - 80/7 + 15x/7 = 16 Multiple everything by 7 (to get rid of fraction) -9(7)x -80 + 15x = 112 Simplify -63x - 80 +15x = 112 -48x -80 =112 -48x=192 x=-4 Substitute into first eqn -3(-4)+7y=-16 12 + 7y = -16 7y= -28 y = -4 x+y= -4 + -4 = -8

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
heartlessprophet: How do i get paid from work when im in job court ?
14 hours ago 0 Replies 0 Medals
Aubree: Guys, what does love feel like? I've been getting a tight chest and when I talk to him my heart rate hangs out around 100-120 beats per min, and when he doe
16 hours ago 8 Replies 1 Medal
KBaby: Any1 down to call
1 day ago 0 Replies 0 Medals
KBaby: Bored af lwk need sum1 to talk to
1 day ago 2 Replies 0 Medals
thereneelg: ok... anyone have advice?? ...I did Choir all throughout Middle school and have ALWAYS been put in Soprano those three years.
1 day ago 6 Replies 1 Medal
kamariana: The Byzantine Procopius is known for (5 points) reconquering much of the old Roma
2 days ago 0 Replies 0 Medals
chuckD: hellp!!! what does it mean to describe a scientist as skeptical Why is sceptical
2 days ago 2 Replies 1 Medal
DoltonCarlee: So like do y'all know anything about the first world war?
1 day ago 2 Replies 0 Medals
thehearken: anyone know how to explain this so its easier for me to understand? b(1)=2, b(n)=
1 day ago 5 Replies 2 Medals
Twaylor: test post
4 days ago 9 Replies 0 Medals
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!