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December 21, 2014

December 21, 2014

Posted by **Lorri** on Friday, July 9, 2010 at 12:42am.

3x + 7y=10

x= 2-2y

A. Solution is an ordered pair

B. No solution

- substitution method -
**Reiny**, Friday, July 9, 2010 at 9:01amthis one is easy, just plug the second equation into the first

3x + 7y = 10

3(2-2y) + 7y = 10

6 - 6y + 7y = 10

y = 4

now back into x = 2 - 2y

x = 2 - 8 = -6

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