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

odpoveď:

# (X, y) na (7, 1) #

vysvetlenie:

# X + 7Y = 0to (1) #

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

# "z rovnice" (1) tox = -7yto (3) #

# "nahradiť" x = -7y "v rovnici" (2) #

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

# -22y = 22 #

# "rozdeliť obe strany podľa" -22 #

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

# "nahradiť" y = -1 "v rovnici" (3) #

# X = -7 (-1) = 7 #

# "priesečník" = (7, -1) #

graf {(y + 1 / 7x) (y-1 / 4x + 11/4) ((x-7) ^ 2 (y + 1) ^ 2-4,04 = 0 -10, 10, -5, 5}