Solving Straight Lines Homework: Find Intersection Point

[xiphoid]

Homework Statement

Lines l_i: ix+(i+1)y+(i+2)=0; i=1,2 intersect at___ point?

Homework Equations

The equation is required at first!

The Attempt at a Solution

I am confused!
How and where should I replace the values of i with 1 or 2?
This is the first step but i am unable to do...

 

[HallsofIvy]

You are given "ix+(i+1)y+(i+2)=0; i=1,2". You replace those "i"s by 1 and 2!

i= 1: 1x+ (1+1)y+ (1+2)= x+ 2y+ 3= 0
i= 2: 2x+ (2+1)y+ (2+ 2)= 2x+ 3y+ 4= 0

 

[xiphoid]

Thanks!

You are given "ix+(i+1)y+(i+2)=0; i=1,2". You replace those "i"s by 1 and 2!

i= 1: 1x+ (1+1)y+ (1+2)= x+ 2y+ 3= 0
i= 2: 2x+ (2+1)y+ (2+ 2)= 2x+ 3y+ 4= 0