Use elimination to solve the system of equations. Enter your answer as an ordered pair; example: (4, -5)

{12x+y=4-2x−2y=-6

Question

Use elimination to solve the system of equations. Enter your answer as an ordered pair; example: (4, -5)

{12x+y=4-2x−2y=-6

anonymous · Answer

no, maybe 
$$12x+y=4\
-2x-2y=-6$$

anonymous · Answer

how fast you want to do it?

anonymous · Answer

im confused

anonymous · Answer

we didn't do anything yet, i just wrote down what i thought the question was

anonymous · Answer

lol so you really must be confused !!
lets go slow

anonymous · Answer

i wrote it wrong its 1/2x + y= 4
-2x-2y=-6

anonymous · Answer

oooh ok 
lets get rid of annoying fraction right away by multiplying everything in the first equation 
$$\frac{1}{2}x+y=4$$ by $4$

anonymous · Answer

we are going to multiply each term by $4$ and get 
$$2x+4y=16$$ for the first one
clear or no?

anonymous · Answer

yes

anonymous · Answer

ok now we line them up 
$$2x+4y=16\
-2x-2y=-6$$

anonymous · Answer

add in a column, and a miracle will occur, 
since $2x-2x=0$ you end up with 
$$2y=10$$ when you add

anonymous · Answer

ok to that step or no?

anonymous · Answer

yes

anonymous · Answer

ok then if $2y=10$ is is pretty clear what $y$ is yes?

anonymous · Answer

please say "yes" (i hope)

anonymous · Answer

5

anonymous · Answer

mm

anonymous · Answer

thanks