X + 7y = 0, 2x-8y = 22?

Jawapan:

# (x, y) ke (7, -1) #

Penjelasan:

# x + 7y = 0to (1) #

# 2x-8y = 22to (2) #

# "dari persamaan" (1) tox = -7yto (3) #

# "pengganti" x = -7y "dalam persamaan" (2) #

# 2 (-7y) -8y = 22 #

# -22y = 22 #

# "membahagi kedua-dua belah pihak dengan" -22 #

# y = 22 / (- 22) = - 1 #

# "pengganti" y = -1 "dalam persamaan" (3) #

# x = -7 (-1) = 7 #

# "titik persilangan" = (7, -1) #

(x-7) ^ 2 + (y + 1) ^ 2-0.04) = 0 -10, 10, -5, 5}