04-04-2019
Mathematics

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-5x+y=-1 and y-4x=3 solve by substitution

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04-04-2019

Y=5x-1

Substitute this into the other equation in the place of y

5x-1-4x=3
X-1=3
X=4

Substitute this into the original equation

Y=5(4)-1
Y=19

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