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How do I use simultaneous equations to solve for the point of intersection for lines.
-y+1=x and y-1=x
3 years ago

Answers

mathhelper
-y+1=x ----> x + y = 1
y-1=x -----> x - y = -1
add them
2x = 0
x = 0

sub that into x+y = 1
0+y = 1
y = 1

so they intersect at (0,1)
3 years ago

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