How do you solve the following system using substitution?: #y=x-4, y=2x#

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How do you solve the following system using substitution?: #y=x-4, y=2x#

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Answer 1 · 2018-06-11T05:44:13

#x = -4 , y= -8#

Explanation:

Substitute eq2 in eq1 :
#" "#
#2x = x - 4#
#" "#
#rArr 2x - x = - 4#
#" "#
#rArr x = -4#
#" "#
Substitute the value of #x# in eq2
#" "#
#y = 2x = 2 (-4) = -8#
#" "#
#therefore x = -4 , y = -8#

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How do you solve the following system using substitution?: #y=x-4, y=2x#

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