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14-07-2017
Mathematics

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solve each system of equations using elimination.

solve each system of equations using elimination class=

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apologiabiology apologiabiology

14-07-2017

add them to eliminate x terms

x+3y=-7
-x-7y=19 +
0x-4y=12

-4y=12
divide by -4
y=-3
sub back
x+3y=-7
x+3(-3)=-7
x-9=-7
x=2

(x,y)
(2,-3)

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