brownnikajeenbe brownnikajeenbe

27-01-2017
Mathematics

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Solve the system of linear equations by substitution 2x-y=6 x=y-1

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xangelcat xangelcat

27-01-2017

substitute x for y-1
2(y-1)-y=6 distribute
2y-2-y=6 subtract y in 2y
y-2=6 add 2 to get y by itself
y=8

Put y back into equation x=y-1
x=8-1
X=7

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