Berapakah -4x + 11y = 15 saat x = 2 y?

Berapakah -4x + 11y = 15 saat x = 2 y?
Anonim

Menjawab:

# x = 10 #

# y = 5 #

Penjelasan:

# -4x + 11y = 15 # --- (1)

# x = 2t # --- (2)

Sub (2) menjadi (1)

# -4 (2thn) + 11thn = 15 #

# -8y + 11y = 15 #

# 3y = 15 #

# y = 5 # --- (3)

Sub (3) menjadi (2)

# x = 2t #

# x = 2 kali55 #

# x = 10 #