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solving systems of equations by substitution how do you do it

Algebra
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6x + 7y = 20   y = 2x

Jan 29th, 2015

6x+7y=20

substituting

6x+7(2x)=20

6x+14x=20

20x=20

x=1

Jan 29th, 2015

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Jan 29th, 2015
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Jan 29th, 2015
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