Was ist -4x + 11y = 15, wenn x = 2 y ist?

Was ist -4x + 11y = 15, wenn x = 2 y ist?
Anonim

Antworten:

# x = 10 #

# y = 5 #

Erläuterung:

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

# x = 2y # --- (2)

Sub (2) in (1)

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

# -8y + 11y = 15 #

# 3y = 15 #

# y = 5 # --- (3)

Sub (3) in (2)

# x = 2y #

# x = 2x5 #

# x = 10 #