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Verified answer
Bab Persamaan GarisMatematika SMP Kelas VIII
ax + by = c, tegak lurus, (p, q)
bx - ay = bp - aq
5x = 2y + 7
5x - 2y = 7, tegak lurus, (-2, 3)
-2x - 5y = -2 . (-2) - 5 . 3
-2x - 5y = 4 - 15
-2x - 5y = -11
2x + 5y = 11