The question asks that I : Find the point of intersection for each pair of lines.(adsbygoogle = window.adsbygoogle || []).push({});

a) x + y= 4, x - 2y=1

b) x + 2y= 0, x - y= 3

c) 2x + y= 1, x + y= 2

d) 6x= 12 - 3y, 1/2y - x= -5

e) 1/2x - y=8, x + 1/3y= 2

f) 5 + y= 4x, x + 2= 2/3y

I understand the formula of y=mx+b, m being the slope and b being the y-intercept. But everytime I try to solve these problems, my answer is different than the one in the book.

I figured I should change each of the equations from standard form to y=mx+b format.

For example a)

x+y=4

y=-x+4

x-2y=1

-2y=-x+1

y=1/2x -1/2

Am I doing something wrong? Because, when I try to draw it out on a graph my answer ends up being something weird like (2 1/3, 3/4).

Also is there any other way I can pind the POI without drawing a graph?

I need this for my exams...so please...help?

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# Homework Help: Point of Intersection.

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