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2x + 3y = 10 + 8
2x + 3y = 18
> 3x + 2y - 7 = 0
3x + 2y = 7
2x + 3y = 18 X3
3x + 2y = 7 X2
6x + 9y = 54
6x + 4y = 14 _
5y = 40
y = 40 : 5
y = 8
jika y = 8 , maka x = ...?
3x + 2y = 7
3x + 2(8) = 7
3x + 16 = 7
3x = 7 - 16
3x = -9
x = -9 : 3
x = -3
jadi X = -3 dan Y = 8
maaf kalau salah..
3x + 2y -7 = 0 ==> 3x + 2y = 7 | x2
6x + 9y = 54
6x + 4y = 14 -
5y = 40
y = 40/5
y = 8
2x + 3y = 10 + 8 | x2
3x + 2y = 7 | x3
4x + 6y = 16
9x + 6y = 21 -
-5x = -5
x = -5/5
x = 1