07-02-2017
Mathematics

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Solve each system by elimination

Solve each system by elimination class=

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07-02-2017

x-y=11
2x+y=19
add them

x-y=11
2x+y=19 +
3x+0y=30

3x=30
divide 3
x=10

sub baack
x-y=11
10-y=11
minus 10
-y=1
times -1
y=-1

(x,y)
(10,-1)

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