Question 318185
{{{y=2x}}}
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{{{ graph(300,300,-10,10,-10,10,2x) }}}
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{{{x=4y}}}
{{{y=(1/4)x}}}
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{{{graph(300,300,-10,10,-10,10,2x,x/4)}}}
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{{{2x-3y=0}}}
{{{3y=2x}}}
{{{y=(2/3)x}}}
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{{{graph(300,300,-10,10,-10,10,2x,x/4,(2/3)x)}}}
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The solution common to all three equations is (0,0).