SOLUTION: When doing the problems i got really lost! I understood how to do the "Elimination Using Addition and Subtraction" problems but when trying to do the "Elimination Using Multiplicat

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: When doing the problems i got really lost! I understood how to do the "Elimination Using Addition and Subtraction" problems but when trying to do the "Elimination Using Multiplicat      Log On


   

Question 69768This question is from textbook Algebra 1
: When doing the problems i got really lost! I understood how to do the "Elimination Using Addition and Subtraction" problems but when trying to do the "Elimination Using Multiplication" problems they didn't make no sense so maybe if you do one for me it will help me please!
2x-y=-1
3x-2y=1 This question is from textbook Algebra 1

Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
2X-Y=-1
3X-2Y=1 MULTIPLICATION REQUIRES ONE OR BOTH EQUATIONS TO BE MULTIPLIED BY SOME NUMBER SO AS TO BE ABLE TO ELIMINATE ONE OF THE UNKNOWNS.
MULTIPLYING THE FIRST EQUATION BY -2 WE GET
-6X+2Y=2 NOW WE CAN ADD THIS EQUATION TO THE SECOND ONE AND ELIMINATE THE Y TERM
3X-2Y=1
-------------------------
-3X=3
X=3/-3
X=-1 ANSWER
2*-1-Y=-1
-2-Y=-1
-Y=-1+2
-Y=1
Y=-1 ANSWER
PROOF
3*-1-2*-1=1
-3+2=1
1=1