Question 376075
12. Y=x+1 and x.y=2 so what x?
1.{{{x*y=2}}}
2.{{{y=x+1}}}
From eq. 1,
{{{y=2/x}}}
Substitute into eq. 2,
{{{2/x=x+1}}}
{{{2=x^2+x}}}
{{{x^2+x-2=0}}}
{{{(x+2)(x-1)=0}}}
Two solutions:
{{{x+2=0}}}
{{{x=-2}}}
Then from eq. 2,
{{{y=-2+1}}}
{{{y=-1}}}
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{{{x-1=0}}}
{{{x=1}}}
Then from eq. 2,
{{{y=1+1}}}
{{{y=2}}}
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{{{drawing(300,300,-5,5,-5,5,grid(1),circle(1,2,0.2),circle(-2,-1,0.2),graph(300,300,-5,5,-5,5,0,x+1,2/x))}}}
You're more likely to get a response if you break up the problems into individuals problems. 
Just listing problems like you have makes the tutors think you want us to do your homework for you. 
Just a suggestion.