Wat is [(-3x-8y = 20), (- 5x + y = 19)]?

Wat is [(-3x-8y = 20), (- 5x + y = 19)]?
Anonim

Antwoord:

# X = -4 #

# Y = -1 #

Uitleg:

# -3x-8Y = 20 # ----------- (1)

# -5x + y = 19 # -------------(2) #xx #8

# -3x-8Y = 20 # ---------------(1)

# -40x 8j + = 152 # -------------(3) ---#(1) + (3)#

# -43x = 172 #

# X = 172 / (- 43) = - 4 #

# X = -4 #

Plaatsvervanger # X = -4 # in vergelijking (2)

# -5 (-4) + y = 19 #

# 20 + y = 19 #

# Y = 19-20 #

# Y = -1 #