1.2x- y= 2 dan x + 2y =6 2.x - 2y= 0 dan 2x + y = -5
Matematika
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Pertanyaan
1.2x- y= 2 dan x + 2y =6
2.x - 2y= 0 dan 2x + y = -5
2.x - 2y= 0 dan 2x + y = -5
2 Jawaban
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1. Jawaban sonya03
1. 2x-y = 2 (X1)
x+2y=6 (X2)
------------------------
2X-Y=2
2x+4y=12
--------------- -
-5y=-10
y=2
2 .x-2y=0 (x2)
2x+y=-5(x1)
--------------------
2x-4y=0
2x+y=-5
---------------- -
-5y=5
y=-1
x-2y=0
x-2(-1)=0
x+2=0
x=-2 -
2. Jawaban coana1999
1.) 2x-y=2 |x 1 => 2x-y=2
x+2y=6 |x 2 => 2x+4y=12
____________-
-5y=-10
y=10/5 =2
2x-y=2 =>
2x-2=2 =>
2x=2+2 =>
2x=4 =>
x=4/2 =>
x=2
2.) x-2y=0 |x2 => 2x-4y=0
2x+y=-5 |x1 => 2x+y=-5
___________-
-5y=5
y=-5/5=-1
x-2y=0 =>
x-2(-1)=0 =>
x+2=0 =>
x=-2