Jawapan:
#color (lembayung) (x = -3, y = 5 #
Penjelasan:
# 10 x + 6 y = 0, "Eqn (1)" #
# -7x + 2y = 31, "Eqn (2)" #
# 21x - 6y = -93, warna (maroon) ("Persamaan (3) = -3 * Persamaan (2)" #
Menambah Persada (1), (3), # 31x = -93 #
#color (lembayung) (x = -3 #
Menggantikan nilai x dalam Persamaan (2), # 21 + 2y = 31 #
# 2y = 31-21 = 10, warna (lembayung) (y = 5 #