Jessie212002 Jessie212002
  • 21-12-2016
  • Mathematics
contestada

What is the solution of the system?
4x+3y=12
7x+5y=26

a. (18,20)
b. (18,-20)
c. (-20,18)
d. (20,18)


Respuesta :

sciguy101 sciguy101
  • 21-12-2016
You can solve the system by isolating the same variable in both equations, then setting those equations equal to each other. For instance, say we isolate y:

[tex]4x+3y=12[/tex]
[tex]3y=12-4x[/tex]
[tex]y=4- \frac{4}{3} x[/tex]

Do the same for the other equation, then set both equations equal to each other. You can then solve for x. Once you have a value for x, you can plug it into either of the original equations and find y!
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