Question #b4526

1 Answer
LM
Feb 3, 2018

#x = 92/45 , y = -2/5#

Explanation:

#9/2x - 2y = 10# (*2)

#x + 1/9y = 2# (* 9)

#9x - 4y = 20#
#9x + y = 18#

subtract these two equations:

#-5y = 2#

#y = -2/5#

then substitute #y# into one of the equations:

#9x + y = 18#

#9x - 2/5 = 18#

#9x = 18 2/5 = 92/5#

#x = 92/45#

#x = 92/45 , y = -2/5#

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