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persamaan kedua kalikan 3
12x - 20y = 88
12x + 9y = 30
____________ -
- 29y = 58
y = - 2
x = 4
HImpunan penyelesaian: (4, - 2)
4x + 3y= 10 | dikali 3|
mencari nilai y :
12x - 20y= 88
12x + 9y= 30 _
-29y= 58
y= 58/-29
y= -2
mencari nilai x :
4x + 3y= 10
4x + 3(-2)= 10
4x - 6= 10
4x= 10 + 6
4x= 16
x= 16/4
x= 4
x= 4
y= -2
HP= {4,-2}