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6x -3y =8
6x = 8 +3y
x =(8 + 3y) per 6
substitusi
4x = 18- 7y
4 × (8 + 3y) per 6 = 18 -7y
4 × (8+3y) = 6 × (18-7y)
32 + 12 y = 108 -42y
12y + 42y = 108 -32
54y = 76
y = 76 per 54
y = 38 per 27
y = 1 11/27
sub y ke persamaan pertama
6x - 3 × (38 per 27) = 8
6x - (38 per 9) = 8
6x = 8 + 38 per 9
6x = 8 + 4 2/9
6x = 12 2per9
x= (12 + 2per9 )× 6
x = 2 + 1per27
x= 2 1/27
hp {(2 1/27, 1 11/27)}