Question 359743
3x+y=7
y=-3x+7 
{{{ graph( 300, 200, -6, 5, -10, 10, -3x +7) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, -3x  +7). 
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"parallel to x+2=0 with x-intercept (-1,0)"
x=-2 
x=-1