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Mathematics 16 Online
OpenStudy (anonymous):

PLEASE HELPPPP WILL REWARD MEDAL AND FAN!!!!!

OpenStudy (anonymous):

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to y from the first equation is substituted into the second equation. 12x - y = -4 4x - 3y = -6

OpenStudy (gorv):

to find equivalet to y calculate value of x in first and put in second 12x - y = -4 12x=y-4 x=y/12-4/12 x=y/12-1/3

OpenStudy (gorv):

put this value 4(y/12-1/3) - 3y = -6

OpenStudy (gorv):

now solve it

OpenStudy (anonymous):

Am I suppose to simplify 4(y/12-1/3) - 3y = -6?

OpenStudy (gorv):

yeah just open the bracket and multiply the 4 inside

OpenStudy (anonymous):

(4y/48-4/12)-3y=-6

OpenStudy (gorv):

\[4* (\frac{ y }{ 12 }-\frac{ 1 }{ 3 }) -3y=-6\]

OpenStudy (gorv):

now can you do

OpenStudy (anonymous):

4x - 3(-12x - 4) = -6 4x - 3(12x + 4) = -6 4(12x + 4) - 3y = -6 4(-12x - 4) - 3y = -6

OpenStudy (anonymous):

these are the answers. I dont expect you to tell me which one but I want to compare them real fast haha

OpenStudy (anonymous):

ok now I'm kida lost

OpenStudy (gorv):

ohh sorryyy we have to find equivalent to y from first 12x - y = -4 12x+4=y now out y in second

OpenStudy (gorv):

4x - 3(12x+4) = -6

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