2x+y = 1 => kali 2 semua => 4x + 2y = 2
3x - 2y = -1
4x + 2y = 2
------------------ +
7x = 1
x = 1/7
2x + y = 1 <= kali 7 , biar pecahan hilang
14x + 7y = 7 <= x = 1/7
14.1/7 + 7y = 7
2 + 7y = 7
7y = 5
y = 5/7
Hp : (x,y) = (1/7,5/7)
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eliminasi :
4x + 3x + 2y + (-2y) = 2 + (-1)
7x = 1
x = 1/7
subtitusi :
2x + y = 1
2(1/7) + y = 1
2/7 + y = 7/7
y = 7/7 - 2/7 = 5/7... #cmiiw
2x+y = 1 => kali 2 semua => 4x + 2y = 2
3x - 2y = -1
4x + 2y = 2
------------------ +
7x = 1
x = 1/7
2x + y = 1 <= kali 7 , biar pecahan hilang
14x + 7y = 7 <= x = 1/7
14.1/7 + 7y = 7
2 + 7y = 7
7y = 5
y = 5/7
x = 1/7
Hp : (x,y) = (1/7,5/7)