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K : ax + 5y =40
g// K nilai a?
g : 2x +3y : 12
3y : 12-2x
y : 2-3 x+4
m1 =-2/3 Karena g // dengan K
m1: m2
- 2/3 : m2
grs K : ax+5y :40
5y :-ax +40
y : -4/5x +m2:-4/5
m2:-4/5
-2/3:-4/5
10=30
4 : 10/3