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m1 = 2/5
krb sejajar, maka gradiennya sama yaitu 2/5
persamaannya
y - 2 = 2/5 (x + 5)
5y - 10 = 2x + 10
5y = 2x + 20
y = 2/5x - ( -2 - 2 )
y = 2/5x + 4
5y = 2x + 20
2x - 5y + 20 = 0