algebra is hard please help

Algebra
Tutor: None Selected Time limit: 1 Day

what is 3x-y=12

5x+2y=20

Mar 29th, 2015

fist multiply by 5,


15x-10y=60

second eqn multiply by 3,

15x+6y=60

subtract first from second

y=0

x=4


Mar 29th, 2015

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Mar 29th, 2015
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Mar 29th, 2015
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