To solve the system of equations below, Grace isolated the variable y in the first equation and then substituted into the second equation. What was the resulting equation?

Question

anonymous · Answer

http://media.apexlearning.com/Images/201011/29/8440faac-a63d-4ac4-a34d-e4cc0068f129.gif

anonymous · Answer

@PRAETORIAN.10 @Loser66

anonymous · Answer

y = (12x)/3
y = 4x (value of y from equation 1)
substitute it in equation 2 you'll get value of x

anonymous · Answer

im confused

anonymous · Answer

why its so simple? type out what exactly confuses you?

anonymous · Answer

dont you have to single out the x?

anonymous · Answer

you have two equations k?
I took value of x from equation 1 (3y = 12x)

anonymous · Answer

thats not how substitution method works... you have to get value of x or y from anyone of the two equations and substitute in the other one.

anonymous · Answer

hmmm

anonymous · Answer

try it out yourself and post your work here I'll help you correct it k?

anonymous · Answer

how do i do that

anonymous · Answer

http://www.purplemath.com/modules/systlin4.htm see this example it is self explanatory... You have to try it yourself in order to learn it

anonymous · Answer

i got it

anonymous · Answer

awesome dude !