Question 73698
An equation with two variables may look hard, but it's really pretty easy.
First, set up the equation like so:
{{{x+9y=9}}}<br>{{{3x+6y=6}}}
Now, multiply the top equation by 3 so that the x's in each equation can be removed by use of subtraction:
{{{3x+6y=6}}}<br>{{{3x+6y=6}}}
Now, subtract the two. This is what you get:
{{{21y=21}}}
Thus, {{{y=1}}}
Finally, plug in the value for {{{y}}} into any equation.
{{{x+9(1)=9}}};{{{x=0}}}