Question 178813
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Line Eqns:{{{system(y=x+2(EQN1),2x+y=8(EQN2))}}}
Subst. EQN 1 in EQN 2:
{{{2x+x+2=8}}}
{{{3x=8-2=6}}}------>{{{cross(3)x/cross(3)=cross(6)2/cross(3)}}}
{{{highlight(x=2)}}} subst. in EQn 1:
{{{y=2+2=highlight(4=y)}}}
We see below,
{{{drawing(400,400,-6,6,-6,6,grid(1),graph(400,400,-6,6,-6,6,x+2,-2x+8),blue(circle(2,4,.12)))}}}----> RED>>> EQN1; GREEN>>>EQN2
Thank you,
Jojo</pre>