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2x -5y = 1
2x -1 = 5y
5y = 2x -1
y = 2/5x -1/5
Maka, (m) gradiennya adalah 2/5.
-5y = -2x -1
y= (-2 : -5)x - 1
y= -2/-5x - 1
gradien= 2/5