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What is -4x+11y=15 when x=2 y ?

1 Answer

Jun 23, 2018

#x=10#
#y=5#

Explanation:

#-4x+11y=15# --- (1)
#x=2y# --- (2)

Sub (2) into (1)
#-4(2y)+11y=15#
#-8y+11y=15#
#3y=15#
#y=5# --- (3)

Sub (3) into (2)
#x=2y#
#x=2times5#
#x=10#

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