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(2x + 5y = 10)3
(3x + 6y = 15)2
6x+15y=30
6x+12y=30
---------------- --
3y=0
y= tidak memungkinkan...
soalnya salah ya?
3x+6y =15. ..... x2
6x + 15y = 30
6x + 12y = 30
__________ -
3y = 0
y =0
subtitusi nilai y
2x +5y = 10
2x + 5(0) =10
2x = 10
maka nilai dr
2x + y = 10+0 =10
jawabannya d