How do you solve $x+3y=8$ and $y=2x-9$ using substitution?

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How do you solve $x+3y=8$ and $y=2x-9$ using substitution?

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Answer 1 · 2016-03-06T01:16:04

I found:
$x=5$
$y=1$

Explanation:

You can use the second equation substituting it, for $y$ , into the second:
$x+3(color(red)(2x-9))=8$
$x+6x-27=8$
$7x=35$
$x=35/7=5$
We substitute this value of $x$ into the second equation to get:
$y=(2*5)-9=10-9=1$

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How do you solve $x+3y=8$ and $y=2x-9$ using substitution?

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Explanation:

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How do you solve x+3y=8 x+3y=8 and y=2x-9y=2x-9 using substitution?

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Explanation:

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How do you solve $x+3y=8$ and $y=2x-9$ using substitution?