SOLUTION: Please help solve. Solve the system of 2 equations and 2 unknowns using the echelon method. x/4 + y/4 = 1 x/5 = y/5 = 12/5 Your help would be appreciated. The question o

Algebra ->  Equations -> SOLUTION: Please help solve. Solve the system of 2 equations and 2 unknowns using the echelon method. x/4 + y/4 = 1 x/5 = y/5 = 12/5 Your help would be appreciated. The question o      Log On


   



Question 982979: Please help solve. Solve the system of 2 equations and 2 unknowns using the echelon method.
x/4 + y/4 = 1
x/5 = y/5 = 12/5
Your help would be appreciated. The question on paper is x is the top number 4 is the bottom number, etc. I did not know how to type the problem in fraction form. Thank you.

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
x%2F4+%2B+y%2F4+=+1
x%2F5+-+y%2F5+=+12%2F5
First step, get rid of the fractions.
Multiply each row by the denominator in the row.
1.x%2By=4
2.x-y=12
Replace the second row by multiplying the previous second row by (-1) and adding to the first row.
x%2By-x%2By=4-12
2y=-8
3.y=-4
So that leaves you with
1.x%2By=4
2.y=-4
Substituting,
x-4=4
x=8