Seudónimo Seudónimo
  • 10-09-2014
  • Mathematics
contestada

Solve a system by substitution method. 

X + 2y = 6
3x - 2y = 2

Help...?

Respuesta :

ashlea ashlea
  • 10-09-2014
you have to set one of the equations equal to one of the variables.  Easiest one would be using the top equation. SO
x=6-2y
then substitute 6-2y in the 2nd equation for the x. SO
3(6-2y)-2y=2
18-6y-2y=2
18-8y=2
-8y=-16
y=2
so you know what y is you can plug in the value of it to find x
3x-2(2)=2
3x-4=2
3x=6
x=2

x=2 and y=2
you can check your answers to see that it is correct

Answer Link

Otras preguntas

how many minutes are in the time interval from 1:22 P.M. to 5:44 P.M.​
A researcher measures extraversion on a 1 to 25 point scale. The researcher is thereby providing a(n) _____ definition for the variable extraversion.
Which space probe has taken photos of mercury?
Match the structures of the male reproductive system to their functions.
A U.S. passport is a valid form of ID? Ture or False
For the data set 7 ,5,10,11,12
Tom strongly believes that raising tax rates for the rich is the only way to steer the economy out of a recession because it is likely to generate greater tax r
What are some similarities between land and sea breezes
True or False? Materials that are good conductors of heat are usually poor conductors of electricity.
A child is born with a small hole in the muscular wall between the right and left side of the heart. Why must this problem be fixed by surgery as soon as possib