Question 1168480
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{{{3x+y=9}}}
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Solve for y:
{{{3x+y-3x=9-3x}}}
{{{3x-3x+y=9-3x}}}
{{{y=9-3x}}}


Solve for x:
{{{3x+y=9}}}
{{{3x=9-y}}}
{{{x=(9-y)/3}}}
{{{x=3-y/3}}}