Menyelesaikan persamaan serentak?

Menyelesaikan persamaan serentak?
Anonim

Jawapan:

# x = 8 #

# y = -10 #

Penjelasan:

# 5x + 4y = 0 # --- (1)

# 4x + 5y = -18 # --- (2)

Daripada (1), # 5x = -4y #

# x = -4 / 5y # --- (3)

Sub (3) ke dalam (2)

# 4times-4 / 5y + 5y = -18 #

# -16 / 5y + 5y = -18 #

# 9 / 5y = -18 #

# y = -18times5 / 9 #

# y = -10 # --- (4)

Sub (4) ke dalam (3)

# x = -4 / 5y #

# x = -4 / 5times-10 #

# x = 8 #