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(=) 8y = 3x-4
y = 3/8x - 1/2
Gradien (M) = 3/8 ---> Karena gradien itu nama lainnya x (kecuali ada ket. tegak lurus/ sejajar)
b) -2x-5y = 8
(=) 5y = -2x-8
y = -2/5x - 8/5
Gradien (M) = -2/5