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September 20, 2014

September 20, 2014

Posted by **paul** on Sunday, November 14, 2010 at 7:27am.

3y=11-x

3x-y=3

thanks

- math - algebra -
**drwls**, Sunday, November 14, 2010 at 8:38amSubstitute 11 -3y for x in the second equation.

Why? Because the first equation tells you that

x = 11 -3y.

You should get

3(11 -3y)= 3 + y

33 - 9y = 3 + y

10y = 30

y = ___ ?

Then solve for x, using either of the first two equations you were given.

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