Friday

July 25, 2014

July 25, 2014

Posted by **andrea** on Friday, February 23, 2007 at 7:50pm.

9x-10y=179

You need to use parentheses to tell us what the problem is. Is equation 1,

y = 9/(11x-17) or is it

y = (9/11)x - 17?

y= 9/11x-17

9x-10y=179

Rewrite them as

11 y - 9 x = -187

and

-10 y + 9x = 179

Add the last two and you get

y = -8

Substitute in any equation for x.

For example,

-88 - 9x = -187

Solve for x to complete the problem.

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