i totally forgot how to do this help?
Solve, using linear combination.
3x + y = 4
2x + y = 4

Question

i totally forgot how to do this help?
Solve, using linear combination.
3x + y = 4
2x + y = 4

freckles · Answer

To setup for elimination you can multiply one (or both ) of the equations by a number such that when you add the equations together a variable is eliminated.

freckles · Answer

That is, if I were you I would multiply equation (2) by -1 
then add the equations together. You will see a variable get eliminated and you will able to solve for the other.

anonymous · Answer

i have already figured it out thank you though

michele_laino · Answer

Since the right sides of your equation are equal each other, we can write:
3x+y=2x+y
groupink like terms, I get:
x=0

michele_laino · Answer

oops..grouping like terms...

michele_laino · Answer

Then please try to substitute x=0, into the first equation, and solve it for y; what didyou get, please?