Question 663592
-x + 3y = 12
...
3y = 12 - x
y = {{{-1/3}}}x + 4
...
{{{graph(300,200,-5,1,-5,10,(-1/3)x+4)}}}
...
Confirm
5 = (-1/3)x + 4
15 = -x + 12
x = 12 - 15 = -3
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