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label Algebra
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Elimination:

y=x-1

4x-y=10 ?

Jul 23rd, 2015

Thank you for the opportunity to help you with your question!

we can write

x-y =1                  ----- (Eq 1)

4x-y =10             ----- (Eq 2)

to eleminate y let us subtract Eq 2 -Eq 1 we get

(4x-x ) +(-y+y) = 10-1

or 3x = 9

divide both side by 3 we get  ; x = 3

Substitute value of x in equation 1 we get

y = 3-1 = 2

Answer  : x = 3  & y = 2


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Jul 23rd, 2015

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